{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Daru Use Case: Analyzing baby names over a period of time.\n",
    "\n",
    "**In this example we'll read data about prevalance of baby names in the US from a bunch of CSV files and try to analyze to data to figure out interesting trends from it.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "if(window['d3'] === undefined ||\n",
       "   window['Nyaplot'] === undefined){\n",
       "    var path = {\"d3\":\"https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min\",\"downloadable\":\"https://cdn.rawgit.com/domitry/d3-downloadable/master/d3-downloadable\"};\n",
       "\n",
       "\n",
       "\n",
       "    var shim = {\"d3\":{\"exports\":\"d3\"},\"downloadable\":{\"exports\":\"downloadable\"}};\n",
       "\n",
       "    require.config({paths: path, shim:shim});\n",
       "\n",
       "\n",
       "require(['d3'], function(d3){window['d3']=d3;console.log('finished loading d3');require(['downloadable'], function(downloadable){window['downloadable']=downloadable;console.log('finished loading downloadable');\n",
       "\n",
       "\tvar script = d3.select(\"head\")\n",
       "\t    .append(\"script\")\n",
       "\t    .attr(\"src\", \"https://cdn.rawgit.com/domitry/Nyaplotjs/master/release/nyaplot.js\")\n",
       "\t    .attr(\"async\", true);\n",
       "\n",
       "\tscript[0][0].onload = script[0][0].onreadystatechange = function(){\n",
       "\n",
       "\n",
       "\t    var event = document.createEvent(\"HTMLEvents\");\n",
       "\t    event.initEvent(\"load_nyaplot\",false,false);\n",
       "\t    window.dispatchEvent(event);\n",
       "\t    console.log('Finished loading Nyaplotjs');\n",
       "\n",
       "\t};\n",
       "\n",
       "\n",
       "});});\n",
       "}\n"
      ],
      "text/plain": [
       "\"if(window['d3'] === undefined ||\\n   window['Nyaplot'] === undefined){\\n    var path = {\\\"d3\\\":\\\"https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min\\\",\\\"downloadable\\\":\\\"https://cdn.rawgit.com/domitry/d3-downloadable/master/d3-downloadable\\\"};\\n\\n\\n\\n    var shim = {\\\"d3\\\":{\\\"exports\\\":\\\"d3\\\"},\\\"downloadable\\\":{\\\"exports\\\":\\\"downloadable\\\"}};\\n\\n    require.config({paths: path, shim:shim});\\n\\n\\nrequire(['d3'], function(d3){window['d3']=d3;console.log('finished loading d3');require(['downloadable'], function(downloadable){window['downloadable']=downloadable;console.log('finished loading downloadable');\\n\\n\\tvar script = d3.select(\\\"head\\\")\\n\\t    .append(\\\"script\\\")\\n\\t    .attr(\\\"src\\\", \\\"https://cdn.rawgit.com/domitry/Nyaplotjs/master/release/nyaplot.js\\\")\\n\\t    .attr(\\\"async\\\", true);\\n\\n\\tscript[0][0].onload = script[0][0].onreadystatechange = function(){\\n\\n\\n\\t    var event = document.createEvent(\\\"HTMLEvents\\\");\\n\\t    event.initEvent(\\\"load_nyaplot\\\",false,false);\\n\\t    window.dispatchEvent(event);\\n\\t    console.log('Finished loading Nyaplotjs');\\n\\n\\t};\\n\\n\\n});});\\n}\\n\""
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "require 'daru'\n",
    "require 'gnuplotrb'"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**The data is contained in multiple CSV files on a per year basis.**\n",
    "\n",
    "**Here's what a raw CSV file looks like for the year 1951. The first column is the name, second the sex and the third the number of births that took place with that name.**\n",
    "\n",
    "**Find the data [here](https://github.com/SciRuby/sciruby-notebooks/tree/master/Data%20Analysis/Analyzing%20baby%20names/data)**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[[\"Linda\", \"F\", \"73933\"], [\"Mary\", \"F\", \"65689\"], [\"Patricia\", \"F\", \"56422\"], [\"Deborah\", \"F\", \"42043\"], [\"Barbara\", \"F\", \"40588\"], [\"Susan\", \"F\", \"40207\"], [\"Nancy\", \"F\", \"30335\"], [\"Karen\", \"F\", \"27986\"], [\"Sandra\", \"F\", \"27656\"], [\"Kathleen\", \"F\", \"26703\"]]"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "CSV.read(\"data/yob1951.txt\").first(10)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**All the CSV files are loaded into a DataFrame, a new column 'year' added to them for identification, and then concatenated to produce one large DataFrame.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<table><tr><th colspan=\"5\">Daru::DataFrame:110707160  rows: 1353205  cols: 4<tr><th></th><th>births</th><th>name</th><th>sex</th><th>year</th></tr><tr><td>0</td><td>73933</td><td>Linda</td><td>F</td><td>1951</td></tr><tr><td>1</td><td>65689</td><td>Mary</td><td>F</td><td>1951</td></tr><tr><td>2</td><td>56422</td><td>Patricia</td><td>F</td><td>1951</td></tr><tr><td>3</td><td>42043</td><td>Deborah</td><td>F</td><td>1951</td></tr><tr><td>4</td><td>40588</td><td>Barbara</td><td>F</td><td>1951</td></tr><tr><td>5</td><td>40207</td><td>Susan</td><td>F</td><td>1951</td></tr><tr><td>6</td><td>30335</td><td>Nancy</td><td>F</td><td>1951</td></tr><tr><td>7</td><td>27986</td><td>Karen</td><td>F</td><td>1951</td></tr><tr><td>8</td><td>27656</td><td>Sandra</td><td>F</td><td>1951</td></tr><tr><td>9</td><td>26703</td><td>Kathleen</td><td>F</td><td>1951</td></tr><tr><td>10</td><td>24773</td><td>Carol</td><td>F</td><td>1951</td></tr><tr><td>11</td><td>24070</td><td>Donna</td><td>F</td><td>1951</td></tr><tr><td>12</td><td>23927</td><td>Sharon</td><td>F</td><td>1951</td></tr><tr><td>13</td><td>21700</td><td>Brenda</td><td>F</td><td>1951</td></tr><tr><td>14</td><td>19835</td><td>Diane</td><td>F</td><td>1951</td></tr><tr><td>15</td><td>18559</td><td>Pamela</td><td>F</td><td>1951</td></tr><tr><td>16</td><td>17683</td><td>Margaret</td><td>F</td><td>1951</td></tr><tr><td>17</td><td>17061</td><td>Debra</td><td>F</td><td>1951</td></tr><tr><td>18</td><td>16949</td><td>Janet</td><td>F</td><td>1951</td></tr><tr><td>19</td><td>16289</td><td>Cynthia</td><td>F</td><td>1951</td></tr><tr><td>20</td><td>15947</td><td>Janice</td><td>F</td><td>1951</td></tr><tr><td>21</td><td>15187</td><td>Carolyn</td><td>F</td><td>1951</td></tr><tr><td>22</td><td>15103</td><td>Elizabeth</td><td>F</td><td>1951</td></tr><tr><td>23</td><td>15016</td><td>Christine</td><td>F</td><td>1951</td></tr><tr><td>24</td><td>14929</td><td>Judith</td><td>F</td><td>1951</td></tr><tr><td>25</td><td>14005</td><td>Judy</td><td>F</td><td>1951</td></tr><tr><td>26</td><td>13909</td><td>Shirley</td><td>F</td><td>1951</td></tr><tr><td>27</td><td>13468</td><td>Joyce</td><td>F</td><td>1951</td></tr><tr><td>28</td><td>12818</td><td>Betty</td><td>F</td><td>1951</td></tr><tr><td>29</td><td>11987</td><td>Cheryl</td><td>F</td><td>1951</td></tr><tr><td>30</td><td>10947</td><td>Gloria</td><td>F</td><td>1951</td></tr><tr><td>31</td><td>10930</td><td>Rebecca</td><td>F</td><td>1951</td></tr><tr><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td></tr><tr><td>1353204</td><td>5</td><td>Zyrin</td><td>M</td><td>2014</td></tr></table>"
      ],
      "text/plain": [
       "\n",
       "#<Daru::DataFrame:110707160 @name = bdcfeb70-5380-4f7d-80e9-1db694055987 @size = 1353205>\n",
       "               births       name        sex       year \n",
       "         0      73933      Linda          F       1951 \n",
       "         1      65689       Mary          F       1951 \n",
       "         2      56422   Patricia          F       1951 \n",
       "         3      42043    Deborah          F       1951 \n",
       "         4      40588    Barbara          F       1951 \n",
       "         5      40207      Susan          F       1951 \n",
       "         6      30335      Nancy          F       1951 \n",
       "         7      27986      Karen          F       1951 \n",
       "         8      27656     Sandra          F       1951 \n",
       "         9      26703   Kathleen          F       1951 \n",
       "        10      24773      Carol          F       1951 \n",
       "        11      24070      Donna          F       1951 \n",
       "        12      23927     Sharon          F       1951 \n",
       "        13      21700     Brenda          F       1951 \n",
       "        14      19835      Diane          F       1951 \n",
       "       ...        ...        ...        ...        ... \n"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "data_frame = Daru::DataFrame.from_csv(\"data/yob1951.txt\", \n",
    "  headers: ['name', 'sex', 'births'])\n",
    "data_frame['year'] = [1951] * data_frame.size\n",
    "\n",
    "(1952..2014).each do |year|\n",
    "  temp = Daru::DataFrame.from_csv(\"data/yob#{year}.txt\", \n",
    "    headers: ['name', 'sex', 'births'])\n",
    "  temp['year'] = [year] * temp.size\n",
    "  data_frame = data_frame.concat(temp)\n",
    "end\n",
    "data_frame.vectors = Daru::Index.new(['births','name', 'sex','year'])\n",
    "\n",
    "data_frame"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Pivot the DataFrame on the year as the row and sex as the column, using the 'births' column for aggregation.**\n",
    "\n",
    "**This tells us the number of male and female births per year.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<table><tr><th colspan=\"3\">Daru::DataFrame:132293920  rows: 64  cols: 2<tr><th></th><th>[\"births\", \"F\"]</th><th>[\"births\", \"M\"]</th></tr><tr><td>[1951]</td><td>1800042</td><td>1881080</td></tr><tr><td>[1952]</td><td>1854698</td><td>1944277</td></tr><tr><td>[1953]</td><td>1880326</td><td>1969777</td></tr><tr><td>[1954]</td><td>1941682</td><td>2037374</td></tr><tr><td>[1955]</td><td>1954664</td><td>2057918</td></tr><tr><td>[1956]</td><td>2007512</td><td>2113694</td></tr><tr><td>[1957]</td><td>2044160</td><td>2155866</td></tr><tr><td>[1958]</td><td>2010884</td><td>2120712</td></tr><tr><td>[1959]</td><td>2023044</td><td>2133509</td></tr><tr><td>[1960]</td><td>2022093</td><td>2132717</td></tr><tr><td>[1961]</td><td>2017316</td><td>2122502</td></tr><tr><td>[1962]</td><td>1966548</td><td>2068945</td></tr><tr><td>[1963]</td><td>1927217</td><td>2031755</td></tr><tr><td>[1964]</td><td>1894594</td><td>1993270</td></tr><tr><td>[1965]</td><td>1765001</td><td>1861378</td></tr><tr><td>[1966]</td><td>1691868</td><td>1783964</td></tr><tr><td>[1967]</td><td>1650764</td><td>1744527</td></tr><tr><td>[1968]</td><td>1640103</td><td>1738928</td></tr><tr><td>[1969]</td><td>1686947</td><td>1789732</td></tr><tr><td>[1970]</td><td>1748147</td><td>1859594</td></tr><tr><td>[1971]</td><td>1663475</td><td>1769201</td></tr><tr><td>[1972]</td><td>1521185</td><td>1622666</td></tr><tr><td>[1973]</td><td>1458139</td><td>1559338</td></tr><tr><td>[1974]</td><td>1467413</td><td>1573105</td></tr><tr><td>[1975]</td><td>1457699</td><td>1562207</td></tr><tr><td>[1976]</td><td>1465096</td><td>1569904</td></tr><tr><td>[1977]</td><td>1532997</td><td>1643684</td></tr><tr><td>[1978]</td><td>1531658</td><td>1642250</td></tr><tr><td>[1979]</td><td>1605051</td><td>1721947</td></tr><tr><td>[1980]</td><td>1659933</td><td>1783876</td></tr><tr><td>[1981]</td><td>1667465</td><td>1790907</td></tr><tr><td>[1982]</td><td>1692678</td><td>1813970</td></tr><tr><td>...</td><td>...</td><td>...</td></tr><tr><td>[2014]</td><td>1768775</td><td>1901376</td></tr></table>"
      ],
      "text/plain": [
       "\n",
       "#<Daru::DataFrame:132293920 @name = bb5d38ea-7d9f-4428-9f24-2c08ce0cda95 @size = 64>\n",
       "           [\"births\", [\"births\", \n",
       "    [1951]    1800042    1881080 \n",
       "    [1952]    1854698    1944277 \n",
       "    [1953]    1880326    1969777 \n",
       "    [1954]    1941682    2037374 \n",
       "    [1955]    1954664    2057918 \n",
       "    [1956]    2007512    2113694 \n",
       "    [1957]    2044160    2155866 \n",
       "    [1958]    2010884    2120712 \n",
       "    [1959]    2023044    2133509 \n",
       "    [1960]    2022093    2132717 \n",
       "    [1961]    2017316    2122502 \n",
       "    [1962]    1966548    2068945 \n",
       "    [1963]    1927217    2031755 \n",
       "    [1964]    1894594    1993270 \n",
       "    [1965]    1765001    1861378 \n",
       "       ...        ...        ... \n"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pivoted = data_frame.pivot_table(\n",
    "  index: ['year'], vectors: ['sex'], agg: :sum, values: 'births')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**The row and column names are rather inconvienient so we rename them into something better.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<table><tr><th colspan=\"3\">Daru::DataFrame:132293920  rows: 64  cols: 2<tr><th></th><th>F</th><th>M</th></tr><tr><td>1951-01-01T00:00:00+00:00</td><td>1800042</td><td>1881080</td></tr><tr><td>1952-01-01T00:00:00+00:00</td><td>1854698</td><td>1944277</td></tr><tr><td>1953-01-01T00:00:00+00:00</td><td>1880326</td><td>1969777</td></tr><tr><td>1954-01-01T00:00:00+00:00</td><td>1941682</td><td>2037374</td></tr><tr><td>1955-01-01T00:00:00+00:00</td><td>1954664</td><td>2057918</td></tr><tr><td>1956-01-01T00:00:00+00:00</td><td>2007512</td><td>2113694</td></tr><tr><td>1957-01-01T00:00:00+00:00</td><td>2044160</td><td>2155866</td></tr><tr><td>1958-01-01T00:00:00+00:00</td><td>2010884</td><td>2120712</td></tr><tr><td>1959-01-01T00:00:00+00:00</td><td>2023044</td><td>2133509</td></tr><tr><td>1960-01-01T00:00:00+00:00</td><td>2022093</td><td>2132717</td></tr><tr><td>1961-01-01T00:00:00+00:00</td><td>2017316</td><td>2122502</td></tr><tr><td>1962-01-01T00:00:00+00:00</td><td>1966548</td><td>2068945</td></tr><tr><td>1963-01-01T00:00:00+00:00</td><td>1927217</td><td>2031755</td></tr><tr><td>1964-01-01T00:00:00+00:00</td><td>1894594</td><td>1993270</td></tr><tr><td>1965-01-01T00:00:00+00:00</td><td>1765001</td><td>1861378</td></tr><tr><td>1966-01-01T00:00:00+00:00</td><td>1691868</td><td>1783964</td></tr><tr><td>1967-01-01T00:00:00+00:00</td><td>1650764</td><td>1744527</td></tr><tr><td>1968-01-01T00:00:00+00:00</td><td>1640103</td><td>1738928</td></tr><tr><td>1969-01-01T00:00:00+00:00</td><td>1686947</td><td>1789732</td></tr><tr><td>1970-01-01T00:00:00+00:00</td><td>1748147</td><td>1859594</td></tr><tr><td>1971-01-01T00:00:00+00:00</td><td>1663475</td><td>1769201</td></tr><tr><td>1972-01-01T00:00:00+00:00</td><td>1521185</td><td>1622666</td></tr><tr><td>1973-01-01T00:00:00+00:00</td><td>1458139</td><td>1559338</td></tr><tr><td>1974-01-01T00:00:00+00:00</td><td>1467413</td><td>1573105</td></tr><tr><td>1975-01-01T00:00:00+00:00</td><td>1457699</td><td>1562207</td></tr><tr><td>1976-01-01T00:00:00+00:00</td><td>1465096</td><td>1569904</td></tr><tr><td>1977-01-01T00:00:00+00:00</td><td>1532997</td><td>1643684</td></tr><tr><td>1978-01-01T00:00:00+00:00</td><td>1531658</td><td>1642250</td></tr><tr><td>1979-01-01T00:00:00+00:00</td><td>1605051</td><td>1721947</td></tr><tr><td>1980-01-01T00:00:00+00:00</td><td>1659933</td><td>1783876</td></tr><tr><td>1981-01-01T00:00:00+00:00</td><td>1667465</td><td>1790907</td></tr><tr><td>1982-01-01T00:00:00+00:00</td><td>1692678</td><td>1813970</td></tr><tr><td>...</td><td>...</td><td>...</td></tr><tr><td>2014-01-01T00:00:00+00:00</td><td>1768775</td><td>1901376</td></tr></table>"
      ],
      "text/plain": [
       "\n",
       "#<Daru::DataFrame:132293920 @name = bb5d38ea-7d9f-4428-9f24-2c08ce0cda95 @size = 64>\n",
       "                    F          M \n",
       "1951-01-01    1800042    1881080 \n",
       "1952-01-01    1854698    1944277 \n",
       "1953-01-01    1880326    1969777 \n",
       "1954-01-01    1941682    2037374 \n",
       "1955-01-01    1954664    2057918 \n",
       "1956-01-01    2007512    2113694 \n",
       "1957-01-01    2044160    2155866 \n",
       "1958-01-01    2010884    2120712 \n",
       "1959-01-01    2023044    2133509 \n",
       "1960-01-01    2022093    2132717 \n",
       "1961-01-01    2017316    2122502 \n",
       "1962-01-01    1966548    2068945 \n",
       "1963-01-01    1927217    2031755 \n",
       "1964-01-01    1894594    1993270 \n",
       "1965-01-01    1765001    1861378 \n",
       "       ...        ...        ... \n"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pivoted.index = Daru::DateTimeIndex.date_range(:start => '1951', :periods => pivoted.size, freq: 'YEAR')\n",
    "pivoted.vectors = Daru::Index.new(['F', 'M'])\n",
    "pivoted"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**The number of male births vs. female births can then be plotted against each other using the GnuplotRB gem.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "image/svg+xml": [
       "<?xml version=\"1.0\" encoding=\"utf-8\"  standalone=\"no\"?>\n",
       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
       "<svg \n",
       " width=\"600\" height=\"480\"\n",
       " viewBox=\"0 0 600 480\"\n",
       " xmlns=\"http://www.w3.org/2000/svg\"\n",
       " xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n",
       ">\n",
       "\n",
       "<title>Gnuplot</title>\n",
       "<desc>Produced by GNUPLOT 5.0 patchlevel 3 </desc>\n",
       "\n",
       "<g id=\"gnuplot_canvas\">\n",
       "\n",
       "<rect x=\"0\" y=\"0\" width=\"600\" height=\"480\" fill=\"none\"/>\n",
       "<defs>\n",
       "\n",
       "\t<circle id='gpDot' r='0.5' stroke-width='0.5'/>\n",
       "\t<path id='gpPt0' stroke-width='0.222' stroke='currentColor' d='M-1,0 h2 M0,-1 v2'/>\n",
       "\t<path id='gpPt1' stroke-width='0.222' stroke='currentColor' d='M-1,-1 L1,1 M1,-1 L-1,1'/>\n",
       "\t<path id='gpPt2' stroke-width='0.222' stroke='currentColor' d='M-1,0 L1,0 M0,-1 L0,1 M-1,-1 L1,1 M-1,1 L1,-1'/>\n",
       "\t<rect id='gpPt3' stroke-width='0.222' stroke='currentColor' x='-1' y='-1' width='2' height='2'/>\n",
       "\t<rect id='gpPt4' stroke-width='0.222' stroke='currentColor' fill='currentColor' x='-1' y='-1' width='2' height='2'/>\n",
       "\t<circle id='gpPt5' stroke-width='0.222' stroke='currentColor' cx='0' cy='0' r='1'/>\n",
       "\t<use xlink:href='#gpPt5' id='gpPt6' fill='currentColor' stroke='none'/>\n",
       "\t<path id='gpPt7' stroke-width='0.222' stroke='currentColor' d='M0,-1.33 L-1.33,0.67 L1.33,0.67 z'/>\n",
       "\t<use xlink:href='#gpPt7' id='gpPt8' fill='currentColor' stroke='none'/>\n",
       "\t<use xlink:href='#gpPt7' id='gpPt9' stroke='currentColor' transform='rotate(180)'/>\n",
       "\t<use xlink:href='#gpPt9' id='gpPt10' fill='currentColor' stroke='none'/>\n",
       "\t<use xlink:href='#gpPt3' id='gpPt11' stroke='currentColor' transform='rotate(45)'/>\n",
       "\t<use xlink:href='#gpPt11' id='gpPt12' fill='currentColor' stroke='none'/>\n",
       "\t<path id='gpPt13' stroke-width='0.222' stroke='currentColor' d='M0,1.330 L1.265,0.411 L0.782,-1.067 L-0.782,-1.076 L-1.265,0.411 z'/>\n",
       "\t<use xlink:href='#gpPt13' id='gpPt14' fill='currentColor' stroke='none'/>\n",
       "\t<filter id='textbox' filterUnits='objectBoundingBox' x='0' y='0' height='1' width='1'>\n",
       "\t  <feFlood flood-color='white' flood-opacity='1' result='bgnd'/>\n",
       "\t  <feComposite in='SourceGraphic' in2='bgnd' operator='atop'/>\n",
       "\t</filter>\n",
       "\t<filter id='greybox' filterUnits='objectBoundingBox' x='0' y='0' height='1' width='1'>\n",
       "\t  <feFlood flood-color='lightgrey' flood-opacity='1' result='grey'/>\n",
       "\t  <feComposite in='SourceGraphic' in2='grey' operator='atop'/>\n",
       "\t</filter>\n",
       "</defs>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,408.0 L87.8,408.0 M575.0,408.0 L566.0,408.0  '/>\t<g transform=\"translate(70.5,412.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.4x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,363.8 L87.8,363.8 M575.0,363.8 L566.0,363.8  '/>\t<g transform=\"translate(70.5,368.3)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.5x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,319.5 L87.8,319.5 M575.0,319.5 L566.0,319.5  '/>\t<g transform=\"translate(70.5,324.0)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.6x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,275.3 L87.8,275.3 M575.0,275.3 L566.0,275.3  '/>\t<g transform=\"translate(70.5,279.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.7x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,231.0 L87.8,231.0 M575.0,231.0 L566.0,231.0  '/>\t<g transform=\"translate(70.5,235.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.8x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,186.8 L87.8,186.8 M575.0,186.8 L566.0,186.8  '/>\t<g transform=\"translate(70.5,191.3)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 1.9x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,142.6 L87.8,142.6 M575.0,142.6 L566.0,142.6  '/>\t<g transform=\"translate(70.5,147.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 2x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,98.3 L87.8,98.3 M575.0,98.3 L566.0,98.3  '/>\t<g transform=\"translate(70.5,102.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 2.1x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,54.1 L87.8,54.1 M575.0,54.1 L566.0,54.1  '/>\t<g transform=\"translate(70.5,58.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 2.2x10</tspan><tspan font-family=\"Arial\"  font-size=\"9.6\" dy=\"-6.00px\">6</tspan><tspan font-size=\"12.0\" dy=\"6.00\"></tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,408.0 L78.8,399.0 M78.8,54.1 L78.8,63.1  '/>\t<g transform=\"translate(78.8,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(78.8,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(78.8,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1946</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M85.7,408.0 L85.7,403.5 M85.7,54.1 L85.7,58.6 M92.6,408.0 L92.6,403.5 M92.6,54.1 L92.6,58.6\n",
       "\t\tM99.5,408.0 L99.5,403.5 M99.5,54.1 L99.5,58.6 M106.4,408.0 L106.4,403.5 M106.4,54.1 L106.4,58.6\n",
       "\t\tM113.3,408.0 L113.3,403.5 M113.3,54.1 L113.3,58.6 M120.2,408.0 L120.2,399.0 M120.2,54.1 L120.2,63.1\n",
       "\t\t '/>\t<g transform=\"translate(120.2,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(120.2,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(120.2,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1952</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M127.1,408.0 L127.1,403.5 M127.1,54.1 L127.1,58.6 M133.9,408.0 L133.9,403.5 M133.9,54.1 L133.9,58.6\n",
       "\t\tM140.8,408.0 L140.8,403.5 M140.8,54.1 L140.8,58.6 M147.7,408.0 L147.7,403.5 M147.7,54.1 L147.7,58.6\n",
       "\t\tM154.6,408.0 L154.6,403.5 M154.6,54.1 L154.6,58.6 M161.5,408.0 L161.5,399.0 M161.5,54.1 L161.5,63.1\n",
       "\t\t '/>\t<g transform=\"translate(161.5,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(161.5,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(161.5,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1958</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M168.4,408.0 L168.4,403.5 M168.4,54.1 L168.4,58.6 M175.3,408.0 L175.3,403.5 M175.3,54.1 L175.3,58.6\n",
       "\t\tM182.2,408.0 L182.2,403.5 M182.2,54.1 L182.2,58.6 M189.1,408.0 L189.1,403.5 M189.1,54.1 L189.1,58.6\n",
       "\t\tM196.0,408.0 L196.0,403.5 M196.0,54.1 L196.0,58.6 M202.9,408.0 L202.9,399.0 M202.9,54.1 L202.9,63.1\n",
       "\t\t '/>\t<g transform=\"translate(202.9,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(202.9,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(202.9,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1964</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M209.8,408.0 L209.8,403.5 M209.8,54.1 L209.8,58.6 M216.6,408.0 L216.6,403.5 M216.6,54.1 L216.6,58.6\n",
       "\t\tM223.5,408.0 L223.5,403.5 M223.5,54.1 L223.5,58.6 M230.4,408.0 L230.4,403.5 M230.4,54.1 L230.4,58.6\n",
       "\t\tM237.3,408.0 L237.3,403.5 M237.3,54.1 L237.3,58.6 M244.2,408.0 L244.2,399.0 M244.2,54.1 L244.2,63.1\n",
       "\t\t '/>\t<g transform=\"translate(244.2,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(244.2,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(244.2,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1970</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M251.1,408.0 L251.1,403.5 M251.1,54.1 L251.1,58.6 M258.0,408.0 L258.0,403.5 M258.0,54.1 L258.0,58.6\n",
       "\t\tM264.9,408.0 L264.9,403.5 M264.9,54.1 L264.9,58.6 M271.8,408.0 L271.8,403.5 M271.8,54.1 L271.8,58.6\n",
       "\t\tM278.7,408.0 L278.7,403.5 M278.7,54.1 L278.7,58.6 M285.6,408.0 L285.6,399.0 M285.6,54.1 L285.6,63.1\n",
       "\t\t '/>\t<g transform=\"translate(285.6,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(285.6,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(285.6,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1976</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M292.5,408.0 L292.5,403.5 M292.5,54.1 L292.5,58.6 M299.3,408.0 L299.3,403.5 M299.3,54.1 L299.3,58.6\n",
       "\t\tM306.2,408.0 L306.2,403.5 M306.2,54.1 L306.2,58.6 M313.1,408.0 L313.1,403.5 M313.1,54.1 L313.1,58.6\n",
       "\t\tM320.0,408.0 L320.0,403.5 M320.0,54.1 L320.0,58.6 M326.9,408.0 L326.9,399.0 M326.9,54.1 L326.9,63.1\n",
       "\t\t '/>\t<g transform=\"translate(326.9,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(326.9,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(326.9,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1982</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M333.8,408.0 L333.8,403.5 M333.8,54.1 L333.8,58.6 M340.7,408.0 L340.7,403.5 M340.7,54.1 L340.7,58.6\n",
       "\t\tM347.6,408.0 L347.6,403.5 M347.6,54.1 L347.6,58.6 M354.5,408.0 L354.5,403.5 M354.5,54.1 L354.5,58.6\n",
       "\t\tM361.4,408.0 L361.4,403.5 M361.4,54.1 L361.4,58.6 M368.3,408.0 L368.3,399.0 M368.3,54.1 L368.3,63.1\n",
       "\t\t '/>\t<g transform=\"translate(368.3,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(368.3,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(368.3,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1988</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M375.2,408.0 L375.2,403.5 M375.2,54.1 L375.2,58.6 M382.0,408.0 L382.0,403.5 M382.0,54.1 L382.0,58.6\n",
       "\t\tM388.9,408.0 L388.9,403.5 M388.9,54.1 L388.9,58.6 M395.8,408.0 L395.8,403.5 M395.8,54.1 L395.8,58.6\n",
       "\t\tM402.7,408.0 L402.7,403.5 M402.7,54.1 L402.7,58.6 M409.6,408.0 L409.6,399.0 M409.6,54.1 L409.6,63.1\n",
       "\t\t '/>\t<g transform=\"translate(409.6,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(409.6,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(409.6,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1994</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M416.5,408.0 L416.5,403.5 M416.5,54.1 L416.5,58.6 M423.4,408.0 L423.4,403.5 M423.4,54.1 L423.4,58.6\n",
       "\t\tM430.3,408.0 L430.3,403.5 M430.3,54.1 L430.3,58.6 M437.2,408.0 L437.2,403.5 M437.2,54.1 L437.2,58.6\n",
       "\t\tM444.1,408.0 L444.1,403.5 M444.1,54.1 L444.1,58.6 M451.0,408.0 L451.0,399.0 M451.0,54.1 L451.0,63.1\n",
       "\t\t '/>\t<g transform=\"translate(451.0,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(451.0,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(451.0,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M457.9,408.0 L457.9,403.5 M457.9,54.1 L457.9,58.6 M464.7,408.0 L464.7,403.5 M464.7,54.1 L464.7,58.6\n",
       "\t\tM471.6,408.0 L471.6,403.5 M471.6,54.1 L471.6,58.6 M478.5,408.0 L478.5,403.5 M478.5,54.1 L478.5,58.6\n",
       "\t\tM485.4,408.0 L485.4,403.5 M485.4,54.1 L485.4,58.6 M492.3,408.0 L492.3,399.0 M492.3,54.1 L492.3,63.1\n",
       "\t\t '/>\t<g transform=\"translate(492.3,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(492.3,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(492.3,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2006</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M499.2,408.0 L499.2,403.5 M499.2,54.1 L499.2,58.6 M506.1,408.0 L506.1,403.5 M506.1,54.1 L506.1,58.6\n",
       "\t\tM513.0,408.0 L513.0,403.5 M513.0,54.1 L513.0,58.6 M519.9,408.0 L519.9,403.5 M519.9,54.1 L519.9,58.6\n",
       "\t\tM526.8,408.0 L526.8,403.5 M526.8,54.1 L526.8,58.6 M533.7,408.0 L533.7,399.0 M533.7,54.1 L533.7,63.1\n",
       "\t\t '/>\t<g transform=\"translate(533.7,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(533.7,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(533.7,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2012</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M540.6,408.0 L540.6,403.5 M540.6,54.1 L540.6,58.6 M547.4,408.0 L547.4,403.5 M547.4,54.1 L547.4,58.6\n",
       "\t\tM554.3,408.0 L554.3,403.5 M554.3,54.1 L554.3,58.6 M561.2,408.0 L561.2,403.5 M561.2,54.1 L561.2,58.6\n",
       "\t\tM568.1,408.0 L568.1,403.5 M568.1,54.1 L568.1,58.6 M575.0,408.0 L575.0,399.0 M575.0,54.1 L575.0,63.1\n",
       "\t\t '/>\t<g transform=\"translate(575.0,430.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >01</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(575.0,448.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jan</tspan></text>\n",
       "\t</g>\n",
       "\t<g transform=\"translate(575.0,466.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2018</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,54.1 L78.8,408.0 L575.0,408.0 L575.0,54.1 L78.8,54.1 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(326.9,31.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Total births by sex and year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1\" ><title>F</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(507.9,76.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >F</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(148,   0, 211)'  d='M516.2,72.1 L558.4,72.1 M113.3,231.0 L120.1,206.9 L127.0,195.5 L133.9,168.4 L140.8,162.6 L147.7,139.3\n",
       "\t\tL154.6,123.0 L161.5,137.8 L168.4,132.4 L175.3,132.8 L182.2,134.9 L189.1,157.4 L196.0,174.8 L202.8,189.2\n",
       "\t\tL209.7,246.5 L216.6,278.9 L223.5,297.1 L230.4,301.8 L237.3,281.1 L244.2,254.0 L251.1,291.4 L258.0,354.4\n",
       "\t\tL264.9,382.3 L271.8,378.2 L278.7,382.5 L285.5,379.2 L292.4,349.2 L299.3,349.8 L306.2,317.3 L313.1,293.0\n",
       "\t\tL320.0,289.7 L326.9,278.5 L333.8,288.5 L340.7,282.8 L347.6,266.4 L354.5,268.8 L361.4,258.5 L368.2,240.0\n",
       "\t\tL375.1,212.0 L382.0,187.8 L388.9,198.1 L395.8,211.9 L402.7,227.3 L409.6,237.7 L416.5,249.7 L423.4,252.2\n",
       "\t\tL430.3,257.7 L437.2,246.1 L444.1,243.2 L450.9,224.6 L457.8,231.5 L464.7,233.2 L471.6,219.8 L478.5,215.9\n",
       "\t\tL485.4,211.0 L492.3,187.5 L499.2,178.2 L506.1,192.5 L513.0,216.5 L519.9,243.1 L526.8,251.6 L533.6,251.4\n",
       "\t\tL540.5,255.2 L547.4,244.9  '/></g>\n",
       "\t</g>\n",
       "\t<g id=\"gnuplot_plot_2\" ><title>M</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(507.9,94.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >M</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(  0, 158, 115)'  d='M516.2,90.1 L558.4,90.1 M113.3,195.2 L120.1,167.2 L127.0,155.9 L133.9,126.0 L140.8,117.0 L147.7,92.3\n",
       "\t\tL154.6,73.6 L161.5,89.2 L168.4,83.5 L175.3,83.9 L182.2,88.4 L189.1,112.1 L196.0,128.5 L202.8,145.6\n",
       "\t\tL209.7,203.9 L216.6,238.1 L223.5,255.6 L230.4,258.1 L237.3,235.6 L244.2,204.7 L251.1,244.7 L258.0,309.5\n",
       "\t\tL264.9,337.5 L271.8,331.4 L278.7,336.2 L285.5,332.8 L292.4,300.2 L299.3,300.8 L306.2,265.6 L313.1,238.2\n",
       "\t\tL320.0,235.1 L326.9,224.9 L333.8,234.7 L340.7,229.4 L347.6,210.2 L354.5,213.3 L361.4,202.0 L368.2,181.2\n",
       "\t\tL375.1,142.6 L382.0,119.3 L388.9,134.0 L395.8,144.2 L402.7,160.1 L409.6,173.0 L416.5,185.6 L423.4,189.7\n",
       "\t\tL430.3,193.8 L437.2,182.3 L444.1,178.5 L450.9,159.2 L457.8,168.6 L464.7,169.2 L471.6,154.3 L478.5,150.2\n",
       "\t\tL485.4,144.9 L492.3,119.4 L499.2,110.7 L506.1,126.5 L513.0,151.7 L519.9,180.7 L526.8,189.8 L533.6,191.5\n",
       "\t\tL540.5,195.0 L547.4,186.2  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"rgb(  0, 158, 115)\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M78.8,54.1 L78.8,408.0 L575.0,408.0 L575.0,54.1 L78.8,54.1 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "</g>\n"
      ],
      "text/plain": [
       "#<GnuplotRB::Plot:0x0000002d6768d0 @options=Hamster::Hash[:xdata => \"time\", :format_x => \"%d\\\\n%b\\\\n%Y\", :title => \"Total births by sex and year\", :timefmt => \"%Y-%m-%dT%H:%M:%S\"], @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x0000002d6766f0 @type=:datablock, @data=#<GnuplotRB::Datablock:0x0000002d676510 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 1800042\\n1952-01-01T00:00:00+00:00 1854698\\n1953-01-01T00:00:00+00:00 1880326\\n1954-01-01T00:00:00+00:00 1941682\\n1955-01-01T00:00:00+00:00 1954664\\n1956-01-01T00:00:00+00:00 2007512\\n1957-01-01T00:00:00+00:00 2044160\\n1958-01-01T00:00:00+00:00 2010884\\n1959-01-01T00:00:00+00:00 2023044\\n1960-01-01T00:00:00+00:00 2022093\\n1961-01-01T00:00:00+00:00 2017316\\n1962-01-01T00:00:00+00:00 1966548\\n1963-01-01T00:00:00+00:00 1927217\\n1964-01-01T00:00:00+00:00 1894594\\n1965-01-01T00:00:00+00:00 1765001\\n1966-01-01T00:00:00+00:00 1691868\\n1967-01-01T00:00:00+00:00 1650764\\n1968-01-01T00:00:00+00:00 1640103\\n1969-01-01T00:00:00+00:00 1686947\\n1970-01-01T00:00:00+00:00 1748147\\n1971-01-01T00:00:00+00:00 1663475\\n1972-01-01T00:00:00+00:00 1521185\\n1973-01-01T00:00:00+00:00 1458139\\n1974-01-01T00:00:00+00:00 1467413\\n1975-01-01T00:00:00+00:00 1457699\\n1976-01-01T00:00:00+00:00 1465096\\n1977-01-01T00:00:00+00:00 1532997\\n1978-01-01T00:00:00+00:00 1531658\\n1979-01-01T00:00:00+00:00 1605051\\n1980-01-01T00:00:00+00:00 1659933\\n1981-01-01T00:00:00+00:00 1667465\\n1982-01-01T00:00:00+00:00 1692678\\n1983-01-01T00:00:00+00:00 1670061\\n1984-01-01T00:00:00+00:00 1682973\\n1985-01-01T00:00:00+00:00 1720036\\n1986-01-01T00:00:00+00:00 1714664\\n1987-01-01T00:00:00+00:00 1737891\\n1988-01-01T00:00:00+00:00 1779839\\n1989-01-01T00:00:00+00:00 1843105\\n1990-01-01T00:00:00+00:00 1897709\\n1991-01-01T00:00:00+00:00 1874434\\n1992-01-01T00:00:00+00:00 1843304\\n1993-01-01T00:00:00+00:00 1808379\\n1994-01-01T00:00:00+00:00 1785074\\n1995-01-01T00:00:00+00:00 1757927\\n1996-01-01T00:00:00+00:00 1752249\\n1997-01-01T00:00:00+00:00 1739806\\n1998-01-01T00:00:00+00:00 1765915\\n1999-01-01T00:00:00+00:00 1772632\\n2000-01-01T00:00:00+00:00 1814601\\n2001-01-01T00:00:00+00:00 1799049\\n2002-01-01T00:00:00+00:00 1795206\\n2003-01-01T00:00:00+00:00 1825359\\n2004-01-01T00:00:00+00:00 1834145\\n2005-01-01T00:00:00+00:00 1845379\\n2006-01-01T00:00:00+00:00 1898463\\n2007-01-01T00:00:00+00:00 1919408\\n2008-01-01T00:00:00+00:00 1887234\\n2009-01-01T00:00:00+00:00 1832925\\n2010-01-01T00:00:00+00:00 1772738\\n2011-01-01T00:00:00+00:00 1753500\\n2012-01-01T00:00:00+00:00 1753922\\n2013-01-01T00:00:00+00:00 1745339\\n2014-01-01T00:00:00+00:00 1768775\\n\">, @options=Hamster::Hash[:title => \"F\", :with => \"lines\", :using => \"1:2\"]>, #<GnuplotRB::Dataset:0x00000019c95108 @type=:datablock, @data=#<GnuplotRB::Datablock:0x00000019c94f28 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 1881080\\n1952-01-01T00:00:00+00:00 1944277\\n1953-01-01T00:00:00+00:00 1969777\\n1954-01-01T00:00:00+00:00 2037374\\n1955-01-01T00:00:00+00:00 2057918\\n1956-01-01T00:00:00+00:00 2113694\\n1957-01-01T00:00:00+00:00 2155866\\n1958-01-01T00:00:00+00:00 2120712\\n1959-01-01T00:00:00+00:00 2133509\\n1960-01-01T00:00:00+00:00 2132717\\n1961-01-01T00:00:00+00:00 2122502\\n1962-01-01T00:00:00+00:00 2068945\\n1963-01-01T00:00:00+00:00 2031755\\n1964-01-01T00:00:00+00:00 1993270\\n1965-01-01T00:00:00+00:00 1861378\\n1966-01-01T00:00:00+00:00 1783964\\n1967-01-01T00:00:00+00:00 1744527\\n1968-01-01T00:00:00+00:00 1738928\\n1969-01-01T00:00:00+00:00 1789732\\n1970-01-01T00:00:00+00:00 1859594\\n1971-01-01T00:00:00+00:00 1769201\\n1972-01-01T00:00:00+00:00 1622666\\n1973-01-01T00:00:00+00:00 1559338\\n1974-01-01T00:00:00+00:00 1573105\\n1975-01-01T00:00:00+00:00 1562207\\n1976-01-01T00:00:00+00:00 1569904\\n1977-01-01T00:00:00+00:00 1643684\\n1978-01-01T00:00:00+00:00 1642250\\n1979-01-01T00:00:00+00:00 1721947\\n1980-01-01T00:00:00+00:00 1783876\\n1981-01-01T00:00:00+00:00 1790907\\n1982-01-01T00:00:00+00:00 1813970\\n1983-01-01T00:00:00+00:00 1791732\\n1984-01-01T00:00:00+00:00 1803830\\n1985-01-01T00:00:00+00:00 1847032\\n1986-01-01T00:00:00+00:00 1840164\\n1987-01-01T00:00:00+00:00 1865662\\n1988-01-01T00:00:00+00:00 1912602\\n1989-01-01T00:00:00+00:00 1999999\\n1990-01-01T00:00:00+00:00 2052543\\n1991-01-01T00:00:00+00:00 2019463\\n1992-01-01T00:00:00+00:00 1996388\\n1993-01-01T00:00:00+00:00 1960397\\n1994-01-01T00:00:00+00:00 1931157\\n1995-01-01T00:00:00+00:00 1902832\\n1996-01-01T00:00:00+00:00 1893378\\n1997-01-01T00:00:00+00:00 1884122\\n1998-01-01T00:00:00+00:00 1910250\\n1999-01-01T00:00:00+00:00 1918809\\n2000-01-01T00:00:00+00:00 1962406\\n2001-01-01T00:00:00+00:00 1941251\\n2002-01-01T00:00:00+00:00 1939815\\n2003-01-01T00:00:00+00:00 1973434\\n2004-01-01T00:00:00+00:00 1982794\\n2005-01-01T00:00:00+00:00 1994841\\n2006-01-01T00:00:00+00:00 2052377\\n2007-01-01T00:00:00+00:00 2072139\\n2008-01-01T00:00:00+00:00 2036289\\n2009-01-01T00:00:00+00:00 1979303\\n2010-01-01T00:00:00+00:00 1913851\\n2011-01-01T00:00:00+00:00 1893230\\n2012-01-01T00:00:00+00:00 1889414\\n2013-01-01T00:00:00+00:00 1881463\\n2014-01-01T00:00:00+00:00 1901376\\n\">, @options=Hamster::Hash[:title => \"M\", :with => \"lines\", :using => \"1:2\"]>], @cmd=\"plot \">"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "GnuplotRB::Plot.new(\n",
    "  [pivoted['F'], with: 'lines', title: 'F'],\n",
    "  [pivoted['M'], with: 'lines', title: 'M'], title: 'Total births by sex and year')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**To further prod into the data, lets perform an SQL style GROUP BY operation on the DataFrame on the 'year' column so that the DataFrame is divided into groups according to year.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "groups_by_year = data_frame.group_by(['year'])\n",
    "nil"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**This code interates over all the groups created by year and selects the rows that contain a particular name in them from.**\n",
    "\n",
    "**In this manner we collect rows from every group on a per year basis and create a DataFrame for each name which tells the number of births of a name during a particular year.**\n",
    "\n",
    "**For this example we'll choose the names James, Robert, Jessica and Sophia.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[\"James\", \"Robert\", \"Jessica\", \"Sophia\"]"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pieces = []\n",
    "['James', 'Robert', 'Jessica', 'Sophia'].each do |name|\n",
    "  rows = []\n",
    "  groups_by_year.each_group do |group|\n",
    "    rows << group.row[group['name'].index_of(name)]\n",
    "  end\n",
    "  pieces << Daru::DataFrame.rows(rows)\n",
    "end"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Perform some basic preprocessing/cleaning on the DataFrame.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[\n",
       "#<Daru::DataFrame:257429020 @name = James @size = 64>\n",
       "               births        sex \n",
       "1951-01-01        259          F \n",
       "1952-01-01        261          F \n",
       "1953-01-01        237          F \n",
       "1954-01-01        226          F \n",
       "1955-01-01        246          F \n",
       "1956-01-01        249          F \n",
       "1957-01-01        281          F \n",
       "1958-01-01        252          F \n",
       "1959-01-01        296          F \n",
       "1960-01-01        288          F \n",
       "1961-01-01        286          F \n",
       "1962-01-01        262          F \n",
       "1963-01-01        311          F \n",
       "1964-01-01        317          F \n",
       "1965-01-01        303          F \n",
       "       ...        ...        ... \n",
       ", \n",
       "#<Daru::DataFrame:83461800 @name = Robert @size = 64>\n",
       "               births        sex \n",
       "1951-01-01        208          F \n",
       "1952-01-01        195          F \n",
       "1953-01-01        228          F \n",
       "1954-01-01        191          F \n",
       "1955-01-01        235          F \n",
       "1956-01-01        214          F \n",
       "1957-01-01        255          F \n",
       "1958-01-01        235          F \n",
       "1959-01-01        237          F \n",
       "1960-01-01        271          F \n",
       "1961-01-01        289          F \n",
       "1962-01-01        229          F \n",
       "1963-01-01        256          F \n",
       "1964-01-01        278          F \n",
       "1965-01-01        255          F \n",
       "       ...        ...        ... \n",
       ", \n",
       "#<Daru::DataFrame:350000980 @name = Jessica @size = 64>\n",
       "               births        sex \n",
       "1951-01-01        466          F \n",
       "1952-01-01        451          F \n",
       "1953-01-01        495          F \n",
       "1954-01-01        423          F \n",
       "1955-01-01        386          F \n",
       "1956-01-01        406          F \n",
       "1957-01-01        476          F \n",
       "1958-01-01        529          F \n",
       "1959-01-01        523          F \n",
       "1960-01-01        559          F \n",
       "1961-01-01        669          F \n",
       "1962-01-01        867          F \n",
       "1963-01-01       1120          F \n",
       "1964-01-01       1172          F \n",
       "1965-01-01       1530          F \n",
       "       ...        ...        ... \n",
       ", \n",
       "#<Daru::DataFrame:128568600 @name = Sophia @size = 64>\n",
       "               births        sex \n",
       "1951-01-01        153          F \n",
       "1952-01-01        111          F \n",
       "1953-01-01        131          F \n",
       "1954-01-01        112          F \n",
       "1955-01-01        152          F \n",
       "1956-01-01        121          F \n",
       "1957-01-01        187          F \n",
       "1958-01-01        227          F \n",
       "1959-01-01        275          F \n",
       "1960-01-01        262          F \n",
       "1961-01-01        324          F \n",
       "1962-01-01        485          F \n",
       "1963-01-01        523          F \n",
       "1964-01-01        470          F \n",
       "1965-01-01        507          F \n",
       "       ...        ...        ... \n",
       "]"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pieces.each do |df|\n",
    "  df['year'].map! {|e| DateTime.new(e) }\n",
    "  df.set_index('year')\n",
    "  df.rename df['name'][0]\n",
    "  df.delete_vector 'name'\n",
    "end"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "image/svg+xml": [
       "<?xml version=\"1.0\" encoding=\"utf-8\"  standalone=\"no\"?>\n",
       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
       "<svg \n",
       " width=\"600\" height=\"480\"\n",
       " viewBox=\"0 0 600 480\"\n",
       " xmlns=\"http://www.w3.org/2000/svg\"\n",
       " xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n",
       ">\n",
       "\n",
       "<title>Gnuplot</title>\n",
       "<desc>Produced by GNUPLOT 5.0 patchlevel 3 </desc>\n",
       "\n",
       "<g id=\"gnuplot_canvas\">\n",
       "\n",
       "<rect x=\"0\" y=\"0\" width=\"600\" height=\"480\" fill=\"none\"/>\n",
       "<defs>\n",
       "\n",
       "\t<circle id='gpDot' r='0.5' stroke-width='0.5'/>\n",
       "\t<path id='gpPt0' stroke-width='0.222' stroke='currentColor' d='M-1,0 h2 M0,-1 v2'/>\n",
       "\t<path id='gpPt1' stroke-width='0.222' stroke='currentColor' d='M-1,-1 L1,1 M1,-1 L-1,1'/>\n",
       "\t<path id='gpPt2' stroke-width='0.222' stroke='currentColor' d='M-1,0 L1,0 M0,-1 L0,1 M-1,-1 L1,1 M-1,1 L1,-1'/>\n",
       "\t<rect id='gpPt3' stroke-width='0.222' stroke='currentColor' x='-1' y='-1' width='2' height='2'/>\n",
       "\t<rect id='gpPt4' stroke-width='0.222' stroke='currentColor' fill='currentColor' x='-1' y='-1' width='2' height='2'/>\n",
       "\t<circle id='gpPt5' stroke-width='0.222' stroke='currentColor' cx='0' cy='0' r='1'/>\n",
       "\t<use xlink:href='#gpPt5' id='gpPt6' fill='currentColor' stroke='none'/>\n",
       "\t<path id='gpPt7' stroke-width='0.222' stroke='currentColor' d='M0,-1.33 L-1.33,0.67 L1.33,0.67 z'/>\n",
       "\t<use xlink:href='#gpPt7' id='gpPt8' fill='currentColor' stroke='none'/>\n",
       "\t<use xlink:href='#gpPt7' id='gpPt9' stroke='currentColor' transform='rotate(180)'/>\n",
       "\t<use xlink:href='#gpPt9' id='gpPt10' fill='currentColor' stroke='none'/>\n",
       "\t<use xlink:href='#gpPt3' id='gpPt11' stroke='currentColor' transform='rotate(45)'/>\n",
       "\t<use xlink:href='#gpPt11' id='gpPt12' fill='currentColor' stroke='none'/>\n",
       "\t<path id='gpPt13' stroke-width='0.222' stroke='currentColor' d='M0,1.330 L1.265,0.411 L0.782,-1.067 L-0.782,-1.076 L-1.265,0.411 z'/>\n",
       "\t<use xlink:href='#gpPt13' id='gpPt14' fill='currentColor' stroke='none'/>\n",
       "\t<filter id='textbox' filterUnits='objectBoundingBox' x='0' y='0' height='1' width='1'>\n",
       "\t  <feFlood flood-color='white' flood-opacity='1' result='bgnd'/>\n",
       "\t  <feComposite in='SourceGraphic' in2='bgnd' operator='atop'/>\n",
       "\t</filter>\n",
       "\t<filter id='greybox' filterUnits='objectBoundingBox' x='0' y='0' height='1' width='1'>\n",
       "\t  <feFlood flood-color='lightgrey' flood-opacity='1' result='grey'/>\n",
       "\t  <feComposite in='SourceGraphic' in2='grey' operator='atop'/>\n",
       "\t</filter>\n",
       "</defs>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(300.0,22.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Prevalence of certain names according to year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,186.0 L80.9,186.0 M275.0,186.0 L266.0,186.0  '/>\t<g transform=\"translate(63.6,190.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,167.1 L80.9,167.1 M275.0,167.1 L266.0,167.1  '/>\t<g transform=\"translate(63.6,171.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 50</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,148.2 L80.9,148.2 M275.0,148.2 L266.0,148.2  '/>\t<g transform=\"translate(63.6,152.7)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 100</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,129.3 L80.9,129.3 M275.0,129.3 L266.0,129.3  '/>\t<g transform=\"translate(63.6,133.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 150</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,110.3 L80.9,110.3 M275.0,110.3 L266.0,110.3  '/>\t<g transform=\"translate(63.6,114.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 200</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,91.4 L80.9,91.4 M275.0,91.4 L266.0,91.4  '/>\t<g transform=\"translate(63.6,95.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 250</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,72.5 L80.9,72.5 M275.0,72.5 L266.0,72.5  '/>\t<g transform=\"translate(63.6,77.0)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 300</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,53.6 L80.9,53.6 M275.0,53.6 L266.0,53.6  '/>\t<g transform=\"translate(63.6,58.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 350</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,34.7 L80.9,34.7 M275.0,34.7 L266.0,34.7  '/>\t<g transform=\"translate(63.6,39.2)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 400</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,186.0 L71.9,177.0  '/>\t<g transform=\"translate(76.4,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1946</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M74.7,186.0 L74.7,181.5 M77.5,186.0 L77.5,181.5 M80.4,186.0 L80.4,181.5 M83.2,186.0 L83.2,181.5\n",
       "\t\tM86.0,186.0 L86.0,181.5 M88.8,186.0 L88.8,177.0  '/>\t<g transform=\"translate(93.3,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1952</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M91.7,186.0 L91.7,181.5 M94.5,186.0 L94.5,181.5 M97.3,186.0 L97.3,181.5 M100.1,186.0 L100.1,181.5\n",
       "\t\tM102.9,186.0 L102.9,181.5 M105.8,186.0 L105.8,177.0  '/>\t<g transform=\"translate(110.3,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1958</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M108.6,186.0 L108.6,181.5 M111.4,186.0 L111.4,181.5 M114.2,186.0 L114.2,181.5 M117.0,186.0 L117.0,181.5\n",
       "\t\tM119.9,186.0 L119.9,181.5 M122.7,186.0 L122.7,177.0  '/>\t<g transform=\"translate(127.2,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1964</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M125.5,186.0 L125.5,181.5 M128.3,186.0 L128.3,181.5 M131.1,186.0 L131.1,181.5 M134.0,186.0 L134.0,181.5\n",
       "\t\tM136.8,186.0 L136.8,181.5 M139.6,186.0 L139.6,177.0  '/>\t<g transform=\"translate(144.1,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1970</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M142.4,186.0 L142.4,181.5 M145.2,186.0 L145.2,181.5 M148.1,186.0 L148.1,181.5 M150.9,186.0 L150.9,181.5\n",
       "\t\tM153.7,186.0 L153.7,181.5 M156.5,186.0 L156.5,177.0  '/>\t<g transform=\"translate(161.0,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1976</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M159.4,186.0 L159.4,181.5 M162.2,186.0 L162.2,181.5 M165.0,186.0 L165.0,181.5 M167.8,186.0 L167.8,181.5\n",
       "\t\tM170.6,186.0 L170.6,181.5 M173.5,186.0 L173.5,177.0  '/>\t<g transform=\"translate(178.0,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1982</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M176.3,186.0 L176.3,181.5 M179.1,186.0 L179.1,181.5 M181.9,186.0 L181.9,181.5 M184.7,186.0 L184.7,181.5\n",
       "\t\tM187.6,186.0 L187.6,181.5 M190.4,186.0 L190.4,177.0  '/>\t<g transform=\"translate(194.9,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1988</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M193.2,186.0 L193.2,181.5 M196.0,186.0 L196.0,181.5 M198.8,186.0 L198.8,181.5 M201.7,186.0 L201.7,181.5\n",
       "\t\tM204.5,186.0 L204.5,181.5 M207.3,186.0 L207.3,177.0  '/>\t<g transform=\"translate(211.8,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1994</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M210.1,186.0 L210.1,181.5 M212.9,186.0 L212.9,181.5 M215.8,186.0 L215.8,181.5 M218.6,186.0 L218.6,181.5\n",
       "\t\tM221.4,186.0 L221.4,181.5 M224.2,186.0 L224.2,177.0  '/>\t<g transform=\"translate(228.7,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M227.1,186.0 L227.1,181.5 M229.9,186.0 L229.9,181.5 M232.7,186.0 L232.7,181.5 M235.5,186.0 L235.5,181.5\n",
       "\t\tM238.3,186.0 L238.3,181.5 M241.2,186.0 L241.2,177.0  '/>\t<g transform=\"translate(245.7,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2006</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M244.0,186.0 L244.0,181.5 M246.8,186.0 L246.8,181.5 M249.6,186.0 L249.6,181.5 M252.4,186.0 L252.4,181.5\n",
       "\t\tM255.3,186.0 L255.3,181.5 M258.1,186.0 L258.1,177.0  '/>\t<g transform=\"translate(262.6,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2012</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M260.9,186.0 L260.9,181.5 M263.7,186.0 L263.7,181.5 M266.5,186.0 L266.5,181.5 M269.4,186.0 L269.4,181.5\n",
       "\t\tM272.2,186.0 L272.2,181.5 M275.0,186.0 L275.0,177.0  '/>\t<g transform=\"translate(279.5,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2018</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,34.7 L71.9,186.0 L275.0,186.0 L275.0,34.7 L71.9,34.7 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(17.6,110.4) rotate(270)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Occurences</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(173.4,240.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1a\" ><title>James</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(207.9,57.2)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >James</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(148,   0, 211)'  d='M216.2,52.7 L258.4,52.7 M86.0,88.0 L88.8,87.3 L91.6,96.4 L94.5,100.5 L97.3,93.0 L100.1,91.8\n",
       "\t\tL102.9,79.7 L105.8,90.7 L108.6,74.0 L111.4,77.1 L114.2,77.8 L117.0,86.9 L119.9,68.4 L122.7,66.1\n",
       "\t\tL125.5,71.4 L128.3,73.7 L131.1,68.0 L134.0,68.0 L136.8,61.6 L139.6,52.1 L142.4,71.8 L145.2,72.9\n",
       "\t\tL148.1,66.1 L150.9,91.1 L153.7,90.3 L156.5,90.3 L159.3,82.7 L162.2,84.3 L165.0,87.3 L167.8,83.5\n",
       "\t\tL170.6,82.7 L173.5,66.5 L176.3,79.3 L179.1,96.0 L181.9,77.4 L184.7,82.7 L187.6,93.0 L190.4,93.7\n",
       "\t\tL193.2,119.4 L196.0,142.5 L198.8,150.1 L201.7,159.5 L204.5,157.6 L207.3,160.7 L210.1,164.4 L212.9,162.5\n",
       "\t\tL215.8,170.1 L218.6,169.0 L221.4,170.9 L224.2,170.9 L227.0,170.1 L229.9,174.3 L232.7,173.1 L235.5,150.1\n",
       "\t\tL238.3,176.2 L241.2,168.6 L244.0,173.5 L246.8,173.9 L249.6,166.7 L252.4,175.0 L255.3,174.7 L258.1,175.4\n",
       "\t\tL260.9,175.4 L263.7,170.1  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"rgb(148,   0, 211)\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M71.9,34.7 L71.9,186.0 L275.0,186.0 L275.0,34.7 L71.9,34.7 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,186.0 L380.9,186.0 M575.0,186.0 L566.0,186.0  '/>\t<g transform=\"translate(363.6,190.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,164.4 L380.9,164.4 M575.0,164.4 L566.0,164.4  '/>\t<g transform=\"translate(363.6,168.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 50</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,142.8 L380.9,142.8 M575.0,142.8 L566.0,142.8  '/>\t<g transform=\"translate(363.6,147.3)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 100</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,121.2 L380.9,121.2 M575.0,121.2 L566.0,121.2  '/>\t<g transform=\"translate(363.6,125.7)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 150</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,99.5 L380.9,99.5 M575.0,99.5 L566.0,99.5  '/>\t<g transform=\"translate(363.6,104.0)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 200</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,77.9 L380.9,77.9 M575.0,77.9 L566.0,77.9  '/>\t<g transform=\"translate(363.6,82.4)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 250</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,56.3 L380.9,56.3 M575.0,56.3 L566.0,56.3  '/>\t<g transform=\"translate(363.6,60.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 300</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,34.7 L380.9,34.7 M575.0,34.7 L566.0,34.7  '/>\t<g transform=\"translate(363.6,39.2)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 350</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,186.0 L371.9,177.0  '/>\t<g transform=\"translate(376.4,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1946</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M374.7,186.0 L374.7,181.5 M377.5,186.0 L377.5,181.5 M380.4,186.0 L380.4,181.5 M383.2,186.0 L383.2,181.5\n",
       "\t\tM386.0,186.0 L386.0,181.5 M388.8,186.0 L388.8,177.0  '/>\t<g transform=\"translate(393.3,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1952</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M391.7,186.0 L391.7,181.5 M394.5,186.0 L394.5,181.5 M397.3,186.0 L397.3,181.5 M400.1,186.0 L400.1,181.5\n",
       "\t\tM402.9,186.0 L402.9,181.5 M405.8,186.0 L405.8,177.0  '/>\t<g transform=\"translate(410.3,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1958</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M408.6,186.0 L408.6,181.5 M411.4,186.0 L411.4,181.5 M414.2,186.0 L414.2,181.5 M417.0,186.0 L417.0,181.5\n",
       "\t\tM419.9,186.0 L419.9,181.5 M422.7,186.0 L422.7,177.0  '/>\t<g transform=\"translate(427.2,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1964</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M425.5,186.0 L425.5,181.5 M428.3,186.0 L428.3,181.5 M431.1,186.0 L431.1,181.5 M434.0,186.0 L434.0,181.5\n",
       "\t\tM436.8,186.0 L436.8,181.5 M439.6,186.0 L439.6,177.0  '/>\t<g transform=\"translate(444.1,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1970</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M442.4,186.0 L442.4,181.5 M445.2,186.0 L445.2,181.5 M448.1,186.0 L448.1,181.5 M450.9,186.0 L450.9,181.5\n",
       "\t\tM453.7,186.0 L453.7,181.5 M456.5,186.0 L456.5,177.0  '/>\t<g transform=\"translate(461.0,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1976</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M459.4,186.0 L459.4,181.5 M462.2,186.0 L462.2,181.5 M465.0,186.0 L465.0,181.5 M467.8,186.0 L467.8,181.5\n",
       "\t\tM470.6,186.0 L470.6,181.5 M473.5,186.0 L473.5,177.0  '/>\t<g transform=\"translate(478.0,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1982</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M476.3,186.0 L476.3,181.5 M479.1,186.0 L479.1,181.5 M481.9,186.0 L481.9,181.5 M484.7,186.0 L484.7,181.5\n",
       "\t\tM487.6,186.0 L487.6,181.5 M490.4,186.0 L490.4,177.0  '/>\t<g transform=\"translate(494.9,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1988</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M493.2,186.0 L493.2,181.5 M496.0,186.0 L496.0,181.5 M498.8,186.0 L498.8,181.5 M501.7,186.0 L501.7,181.5\n",
       "\t\tM504.5,186.0 L504.5,181.5 M507.3,186.0 L507.3,177.0  '/>\t<g transform=\"translate(511.8,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1994</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M510.1,186.0 L510.1,181.5 M512.9,186.0 L512.9,181.5 M515.8,186.0 L515.8,181.5 M518.6,186.0 L518.6,181.5\n",
       "\t\tM521.4,186.0 L521.4,181.5 M524.2,186.0 L524.2,177.0  '/>\t<g transform=\"translate(528.7,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M527.1,186.0 L527.1,181.5 M529.9,186.0 L529.9,181.5 M532.7,186.0 L532.7,181.5 M535.5,186.0 L535.5,181.5\n",
       "\t\tM538.3,186.0 L538.3,181.5 M541.2,186.0 L541.2,177.0  '/>\t<g transform=\"translate(545.7,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2006</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M544.0,186.0 L544.0,181.5 M546.8,186.0 L546.8,181.5 M549.6,186.0 L549.6,181.5 M552.4,186.0 L552.4,181.5\n",
       "\t\tM555.3,186.0 L555.3,181.5 M558.1,186.0 L558.1,177.0  '/>\t<g transform=\"translate(562.6,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2012</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M560.9,186.0 L560.9,181.5 M563.7,186.0 L563.7,181.5 M566.5,186.0 L566.5,181.5 M569.4,186.0 L569.4,181.5\n",
       "\t\tM572.2,186.0 L572.2,181.5 M575.0,186.0 L575.0,177.0  '/>\t<g transform=\"translate(579.5,194.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2018</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,34.7 L371.9,186.0 L575.0,186.0 L575.0,34.7 L371.9,34.7 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(317.6,110.4) rotate(270)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Occurences</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(473.4,240.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1b\" ><title>Robert</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(507.9,57.2)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Robert</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(148,   0, 211)'  d='M516.2,52.7 L558.4,52.7 M386.0,96.1 L388.8,101.7 L391.6,87.4 L394.5,103.4 L397.3,84.4 L400.1,93.5\n",
       "\t\tL402.9,75.8 L405.8,84.4 L408.6,83.5 L411.4,68.9 L414.2,61.1 L417.0,87.0 L419.9,75.3 L422.7,65.8\n",
       "\t\tL425.5,75.8 L428.3,77.5 L431.1,75.8 L434.0,71.4 L436.8,41.2 L439.6,44.2 L442.4,57.6 L445.2,61.5\n",
       "\t\tL448.1,78.4 L450.9,81.4 L453.7,80.5 L456.5,84.0 L459.3,83.1 L462.2,75.8 L465.0,77.1 L467.8,76.2\n",
       "\t\tL470.6,87.4 L473.5,85.3 L476.3,75.8 L479.1,86.6 L481.9,83.1 L484.7,81.8 L487.6,91.3 L490.4,107.3\n",
       "\t\tL493.2,131.5 L496.0,138.9 L498.8,152.7 L501.7,160.5 L504.5,155.7 L507.3,163.5 L510.1,167.0 L512.9,170.0\n",
       "\t\tL515.8,170.4 L518.6,173.9 L521.4,175.6 L524.2,176.1 L527.0,176.9 L529.9,179.9 L532.7,179.1 L535.5,170.9\n",
       "\t\tL538.3,178.7 L541.2,181.2 L544.0,182.1 L546.8,183.0 L549.6,181.2 L552.4,180.8 L555.3,182.1 L558.1,183.0\n",
       "\t\tL560.9,182.5 L563.7,183.4  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"rgb(148,   0, 211)\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M371.9,34.7 L371.9,186.0 L575.0,186.0 L575.0,34.7 L371.9,34.7 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,417.0 L97.5,417.0 M275.0,417.0 L266.0,417.0  '/>\t<g transform=\"translate(80.2,421.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,391.8 L97.5,391.8 M275.0,391.8 L266.0,391.8  '/>\t<g transform=\"translate(80.2,396.3)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 10000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,366.5 L97.5,366.5 M275.0,366.5 L266.0,366.5  '/>\t<g transform=\"translate(80.2,371.0)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 20000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,341.3 L97.5,341.3 M275.0,341.3 L266.0,341.3  '/>\t<g transform=\"translate(80.2,345.8)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 30000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,316.1 L97.5,316.1 M275.0,316.1 L266.0,316.1  '/>\t<g transform=\"translate(80.2,320.6)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 40000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,290.8 L97.5,290.8 M275.0,290.8 L266.0,290.8  '/>\t<g transform=\"translate(80.2,295.3)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 50000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,265.6 L97.5,265.6 M275.0,265.6 L266.0,265.6  '/>\t<g transform=\"translate(80.2,270.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 60000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,417.0 L88.5,408.0  '/>\t<g transform=\"translate(93.0,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1946</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M91.1,417.0 L91.1,412.5 M93.7,417.0 L93.7,412.5 M96.3,417.0 L96.3,412.5 M98.9,417.0 L98.9,412.5\n",
       "\t\tM101.5,417.0 L101.5,412.5 M104.0,417.0 L104.0,408.0  '/>\t<g transform=\"translate(108.5,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1952</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M106.6,417.0 L106.6,412.5 M109.2,417.0 L109.2,412.5 M111.8,417.0 L111.8,412.5 M114.4,417.0 L114.4,412.5\n",
       "\t\tM117.0,417.0 L117.0,412.5 M119.6,417.0 L119.6,408.0  '/>\t<g transform=\"translate(124.1,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1958</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M122.2,417.0 L122.2,412.5 M124.8,417.0 L124.8,412.5 M127.4,417.0 L127.4,412.5 M129.9,417.0 L129.9,412.5\n",
       "\t\tM132.5,417.0 L132.5,412.5 M135.1,417.0 L135.1,408.0  '/>\t<g transform=\"translate(139.6,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1964</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M137.7,417.0 L137.7,412.5 M140.3,417.0 L140.3,412.5 M142.9,417.0 L142.9,412.5 M145.5,417.0 L145.5,412.5\n",
       "\t\tM148.1,417.0 L148.1,412.5 M150.7,417.0 L150.7,408.0  '/>\t<g transform=\"translate(155.2,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1970</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M153.3,417.0 L153.3,412.5 M155.8,417.0 L155.8,412.5 M158.4,417.0 L158.4,412.5 M161.0,417.0 L161.0,412.5\n",
       "\t\tM163.6,417.0 L163.6,412.5 M166.2,417.0 L166.2,408.0  '/>\t<g transform=\"translate(170.7,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1976</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M168.8,417.0 L168.8,412.5 M171.4,417.0 L171.4,412.5 M174.0,417.0 L174.0,412.5 M176.6,417.0 L176.6,412.5\n",
       "\t\tM179.2,417.0 L179.2,412.5 M181.8,417.0 L181.8,408.0  '/>\t<g transform=\"translate(186.3,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1982</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M184.3,417.0 L184.3,412.5 M186.9,417.0 L186.9,412.5 M189.5,417.0 L189.5,412.5 M192.1,417.0 L192.1,412.5\n",
       "\t\tM194.7,417.0 L194.7,412.5 M197.3,417.0 L197.3,408.0  '/>\t<g transform=\"translate(201.8,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1988</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M199.9,417.0 L199.9,412.5 M202.5,417.0 L202.5,412.5 M205.1,417.0 L205.1,412.5 M207.7,417.0 L207.7,412.5\n",
       "\t\tM210.3,417.0 L210.3,412.5 M212.8,417.0 L212.8,408.0  '/>\t<g transform=\"translate(217.3,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1994</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M215.4,417.0 L215.4,412.5 M218.0,417.0 L218.0,412.5 M220.6,417.0 L220.6,412.5 M223.2,417.0 L223.2,412.5\n",
       "\t\tM225.8,417.0 L225.8,412.5 M228.4,417.0 L228.4,408.0  '/>\t<g transform=\"translate(232.9,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M231.0,417.0 L231.0,412.5 M233.6,417.0 L233.6,412.5 M236.1,417.0 L236.1,412.5 M238.7,417.0 L238.7,412.5\n",
       "\t\tM241.3,417.0 L241.3,412.5 M243.9,417.0 L243.9,408.0  '/>\t<g transform=\"translate(248.4,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2006</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M246.5,417.0 L246.5,412.5 M249.1,417.0 L249.1,412.5 M251.7,417.0 L251.7,412.5 M254.3,417.0 L254.3,412.5\n",
       "\t\tM256.9,417.0 L256.9,412.5 M259.5,417.0 L259.5,408.0  '/>\t<g transform=\"translate(264.0,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2012</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M262.1,417.0 L262.1,412.5 M264.6,417.0 L264.6,412.5 M267.2,417.0 L267.2,412.5 M269.8,417.0 L269.8,412.5\n",
       "\t\tM272.4,417.0 L272.4,412.5 M275.0,417.0 L275.0,408.0  '/>\t<g transform=\"translate(279.5,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2018</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,265.6 L88.5,417.0 L275.0,417.0 L275.0,265.6 L88.5,265.6 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(17.6,341.3) rotate(270)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Occurences</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(181.7,471.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1c\" ><title>Jessica</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(207.9,288.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Jessica</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(148,   0, 211)'  d='M216.2,283.6 L258.4,283.6 M101.4,415.8 L104.0,415.9 L106.6,415.8 L109.2,415.9 L111.8,416.0 L114.4,416.0\n",
       "\t\tL117.0,415.8 L119.6,415.7 L122.2,415.7 L124.8,415.6 L127.4,415.3 L129.9,414.8 L132.5,414.2 L135.1,414.0\n",
       "\t\tL137.7,413.1 L140.3,412.8 L142.9,412.6 L145.5,412.3 L148.1,410.7 L150.7,406.9 L153.3,403.5 L155.8,401.3\n",
       "\t\tL158.4,398.8 L161.0,390.1 L163.6,384.4 L166.2,370.6 L168.8,354.3 L171.4,351.1 L174.0,346.9 L176.6,331.4\n",
       "\t\tL179.2,309.7 L181.8,302.3 L184.3,302.7 L186.9,301.3 L189.5,295.0 L192.1,284.1 L194.7,275.7 L197.3,287.0\n",
       "\t\tL199.9,296.2 L202.5,299.8 L205.1,307.5 L207.6,320.2 L210.2,328.7 L212.8,336.0 L215.4,346.5 L218.0,356.0\n",
       "\t\tL220.6,363.9 L223.2,371.0 L225.8,375.8 L228.4,377.4 L231.0,381.9 L233.6,386.9 L236.1,390.6 L238.7,393.1\n",
       "\t\tL241.3,396.5 L243.9,399.8 L246.5,402.6 L249.1,405.1 L251.7,407.4 L254.3,408.9 L256.9,410.4 L259.5,411.1\n",
       "\t\tL262.1,412.1 L264.6,412.5  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"rgb(148,   0, 211)\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M88.5,265.6 L88.5,417.0 L275.0,417.0 L275.0,265.6 L88.5,265.6 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,417.0 L397.5,417.0 M575.0,417.0 L566.0,417.0  '/>\t<g transform=\"translate(380.2,421.5)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 0</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,386.7 L397.5,386.7 M575.0,386.7 L566.0,386.7  '/>\t<g transform=\"translate(380.2,391.2)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 5000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,356.4 L397.5,356.4 M575.0,356.4 L566.0,356.4  '/>\t<g transform=\"translate(380.2,360.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 10000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,326.2 L397.5,326.2 M575.0,326.2 L566.0,326.2  '/>\t<g transform=\"translate(380.2,330.7)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 15000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,295.9 L397.5,295.9 M575.0,295.9 L566.0,295.9  '/>\t<g transform=\"translate(380.2,300.4)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 20000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,265.6 L397.5,265.6 M575.0,265.6 L566.0,265.6  '/>\t<g transform=\"translate(380.2,270.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" > 25000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,417.0 L388.5,408.0  '/>\t<g transform=\"translate(393.0,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1946</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M391.1,417.0 L391.1,412.5 M393.7,417.0 L393.7,412.5 M396.3,417.0 L396.3,412.5 M398.9,417.0 L398.9,412.5\n",
       "\t\tM401.5,417.0 L401.5,412.5 M404.0,417.0 L404.0,408.0  '/>\t<g transform=\"translate(408.5,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1952</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M406.6,417.0 L406.6,412.5 M409.2,417.0 L409.2,412.5 M411.8,417.0 L411.8,412.5 M414.4,417.0 L414.4,412.5\n",
       "\t\tM417.0,417.0 L417.0,412.5 M419.6,417.0 L419.6,408.0  '/>\t<g transform=\"translate(424.1,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1958</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M422.2,417.0 L422.2,412.5 M424.8,417.0 L424.8,412.5 M427.4,417.0 L427.4,412.5 M429.9,417.0 L429.9,412.5\n",
       "\t\tM432.5,417.0 L432.5,412.5 M435.1,417.0 L435.1,408.0  '/>\t<g transform=\"translate(439.6,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1964</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M437.7,417.0 L437.7,412.5 M440.3,417.0 L440.3,412.5 M442.9,417.0 L442.9,412.5 M445.5,417.0 L445.5,412.5\n",
       "\t\tM448.1,417.0 L448.1,412.5 M450.7,417.0 L450.7,408.0  '/>\t<g transform=\"translate(455.2,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1970</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M453.3,417.0 L453.3,412.5 M455.8,417.0 L455.8,412.5 M458.4,417.0 L458.4,412.5 M461.0,417.0 L461.0,412.5\n",
       "\t\tM463.6,417.0 L463.6,412.5 M466.2,417.0 L466.2,408.0  '/>\t<g transform=\"translate(470.7,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1976</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M468.8,417.0 L468.8,412.5 M471.4,417.0 L471.4,412.5 M474.0,417.0 L474.0,412.5 M476.6,417.0 L476.6,412.5\n",
       "\t\tM479.2,417.0 L479.2,412.5 M481.8,417.0 L481.8,408.0  '/>\t<g transform=\"translate(486.3,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1982</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M484.3,417.0 L484.3,412.5 M486.9,417.0 L486.9,412.5 M489.5,417.0 L489.5,412.5 M492.1,417.0 L492.1,412.5\n",
       "\t\tM494.7,417.0 L494.7,412.5 M497.3,417.0 L497.3,408.0  '/>\t<g transform=\"translate(501.8,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1988</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M499.9,417.0 L499.9,412.5 M502.5,417.0 L502.5,412.5 M505.1,417.0 L505.1,412.5 M507.7,417.0 L507.7,412.5\n",
       "\t\tM510.3,417.0 L510.3,412.5 M512.8,417.0 L512.8,408.0  '/>\t<g transform=\"translate(517.3,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >1994</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M515.4,417.0 L515.4,412.5 M518.0,417.0 L518.0,412.5 M520.6,417.0 L520.6,412.5 M523.2,417.0 L523.2,412.5\n",
       "\t\tM525.8,417.0 L525.8,412.5 M528.4,417.0 L528.4,408.0  '/>\t<g transform=\"translate(532.9,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2000</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M531.0,417.0 L531.0,412.5 M533.6,417.0 L533.6,412.5 M536.1,417.0 L536.1,412.5 M538.7,417.0 L538.7,412.5\n",
       "\t\tM541.3,417.0 L541.3,412.5 M543.9,417.0 L543.9,408.0  '/>\t<g transform=\"translate(548.4,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2006</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M546.5,417.0 L546.5,412.5 M549.1,417.0 L549.1,412.5 M551.7,417.0 L551.7,412.5 M554.3,417.0 L554.3,412.5\n",
       "\t\tM556.9,417.0 L556.9,412.5 M559.5,417.0 L559.5,408.0  '/>\t<g transform=\"translate(564.0,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2012</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M562.1,417.0 L562.1,412.5 M564.6,417.0 L564.6,412.5 M567.2,417.0 L567.2,412.5 M569.8,417.0 L569.8,412.5\n",
       "\t\tM572.4,417.0 L572.4,412.5 M575.0,417.0 L575.0,408.0  '/>\t<g transform=\"translate(579.5,425.3) rotate(45)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"start\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >2018</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,265.6 L388.5,417.0 L575.0,417.0 L575.0,265.6 L388.5,265.6 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(317.6,341.3) rotate(270)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Occurences</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(481.7,471.9)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"middle\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Year</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "\t<g id=\"gnuplot_plot_1d\" ><title>Sophia</title>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<g transform=\"translate(507.9,288.1)\" stroke=\"none\" fill=\"black\" font-family=\"Arial\" font-size=\"12.00\"  text-anchor=\"end\">\n",
       "\t\t<text><tspan font-family=\"Arial\" >Sophia</tspan></text>\n",
       "\t</g>\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='rgb(148,   0, 211)'  d='M516.2,283.6 L558.4,283.6 M401.4,416.1 L404.0,416.3 L406.6,416.2 L409.2,416.3 L411.8,416.1 L414.4,416.3\n",
       "\t\tL417.0,415.9 L419.6,415.6 L422.2,415.3 L424.8,415.4 L427.4,415.0 L429.9,414.1 L432.5,413.8 L435.1,414.2\n",
       "\t\tL437.7,413.9 L440.3,413.4 L442.9,413.4 L445.5,413.7 L448.1,413.4 L450.7,413.5 L453.3,413.4 L455.8,414.1\n",
       "\t\tL458.4,414.2 L461.0,414.7 L463.6,414.7 L466.2,414.8 L468.8,414.4 L471.4,414.5 L474.0,414.0 L476.6,413.1\n",
       "\t\tL479.2,409.5 L481.8,410.0 L484.3,409.8 L486.9,410.4 L489.5,410.4 L492.1,410.6 L494.7,410.2 L497.3,410.0\n",
       "\t\tL499.9,410.6 L502.5,410.2 L505.1,409.4 L507.6,408.8 L510.2,407.9 L512.8,407.2 L515.4,406.3 L518.0,401.8\n",
       "\t\tL520.6,395.0 L523.2,390.9 L525.8,384.2 L528.4,377.3 L531.0,373.7 L533.6,364.5 L536.1,358.4 L538.7,350.9\n",
       "\t\tL541.3,340.3 L543.9,335.3 L546.5,314.0 L549.1,319.7 L551.7,314.5 L554.3,292.2 L556.9,284.9 L559.5,282.2\n",
       "\t\tL562.1,288.9 L564.6,305.0  '/></g>\n",
       "\t</g>\n",
       "<g fill=\"none\" color=\"white\" stroke=\"rgb(148,   0, 211)\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"2.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"black\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "\t<path stroke='black'  d='M388.5,265.6 L388.5,417.0 L575.0,417.0 L575.0,265.6 L388.5,265.6 Z  '/></g>\n",
       "<g fill=\"none\" color=\"black\" stroke=\"currentColor\" stroke-width=\"1.00\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\">\n",
       "</g>\n",
       "</g>\n"
      ],
      "text/plain": [
       "#<GnuplotRB::Multiplot:0x000000276b6378 @plots=Hamster::Vector[#<GnuplotRB::Plot:0x000000237b4f08 @options=Hamster::Hash[:xdata => \"time\", :format_x => [\"%Y\"], :timefmt => \"%Y-%m-%dT%H:%M:%S\"], @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x000000237b4e68 @type=:datablock, @data=#<GnuplotRB::Datablock:0x000000237b4b48 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 259\\n1952-01-01T00:00:00+00:00 261\\n1953-01-01T00:00:00+00:00 237\\n1954-01-01T00:00:00+00:00 226\\n1955-01-01T00:00:00+00:00 246\\n1956-01-01T00:00:00+00:00 249\\n1957-01-01T00:00:00+00:00 281\\n1958-01-01T00:00:00+00:00 252\\n1959-01-01T00:00:00+00:00 296\\n1960-01-01T00:00:00+00:00 288\\n1961-01-01T00:00:00+00:00 286\\n1962-01-01T00:00:00+00:00 262\\n1963-01-01T00:00:00+00:00 311\\n1964-01-01T00:00:00+00:00 317\\n1965-01-01T00:00:00+00:00 303\\n1966-01-01T00:00:00+00:00 297\\n1967-01-01T00:00:00+00:00 312\\n1968-01-01T00:00:00+00:00 312\\n1969-01-01T00:00:00+00:00 329\\n1970-01-01T00:00:00+00:00 354\\n1971-01-01T00:00:00+00:00 302\\n1972-01-01T00:00:00+00:00 299\\n1973-01-01T00:00:00+00:00 317\\n1974-01-01T00:00:00+00:00 251\\n1975-01-01T00:00:00+00:00 253\\n1976-01-01T00:00:00+00:00 253\\n1977-01-01T00:00:00+00:00 273\\n1978-01-01T00:00:00+00:00 269\\n1979-01-01T00:00:00+00:00 261\\n1980-01-01T00:00:00+00:00 271\\n1981-01-01T00:00:00+00:00 273\\n1982-01-01T00:00:00+00:00 316\\n1983-01-01T00:00:00+00:00 282\\n1984-01-01T00:00:00+00:00 238\\n1985-01-01T00:00:00+00:00 287\\n1986-01-01T00:00:00+00:00 273\\n1987-01-01T00:00:00+00:00 246\\n1988-01-01T00:00:00+00:00 244\\n1989-01-01T00:00:00+00:00 176\\n1990-01-01T00:00:00+00:00 115\\n1991-01-01T00:00:00+00:00 95\\n1992-01-01T00:00:00+00:00 70\\n1993-01-01T00:00:00+00:00 75\\n1994-01-01T00:00:00+00:00 67\\n1995-01-01T00:00:00+00:00 57\\n1996-01-01T00:00:00+00:00 62\\n1997-01-01T00:00:00+00:00 42\\n1998-01-01T00:00:00+00:00 45\\n1999-01-01T00:00:00+00:00 40\\n2000-01-01T00:00:00+00:00 40\\n2001-01-01T00:00:00+00:00 42\\n2002-01-01T00:00:00+00:00 31\\n2003-01-01T00:00:00+00:00 34\\n2004-01-01T00:00:00+00:00 95\\n2005-01-01T00:00:00+00:00 26\\n2006-01-01T00:00:00+00:00 46\\n2007-01-01T00:00:00+00:00 33\\n2008-01-01T00:00:00+00:00 32\\n2009-01-01T00:00:00+00:00 51\\n2010-01-01T00:00:00+00:00 29\\n2011-01-01T00:00:00+00:00 30\\n2012-01-01T00:00:00+00:00 28\\n2013-01-01T00:00:00+00:00 28\\n2014-01-01T00:00:00+00:00 42\\n\">, @options=Hamster::Hash[:title => \"James\", :with => \"lines\", :using => \"1:2\"]>], @cmd=\"plot \">, #<GnuplotRB::Plot:0x0000001f0466f8 @options=Hamster::Hash[:xdata => \"time\", :format_x => [\"%Y\"], :timefmt => \"%Y-%m-%dT%H:%M:%S\"], @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x0000001f046658 @type=:datablock, @data=#<GnuplotRB::Datablock:0x0000001f046478 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 208\\n1952-01-01T00:00:00+00:00 195\\n1953-01-01T00:00:00+00:00 228\\n1954-01-01T00:00:00+00:00 191\\n1955-01-01T00:00:00+00:00 235\\n1956-01-01T00:00:00+00:00 214\\n1957-01-01T00:00:00+00:00 255\\n1958-01-01T00:00:00+00:00 235\\n1959-01-01T00:00:00+00:00 237\\n1960-01-01T00:00:00+00:00 271\\n1961-01-01T00:00:00+00:00 289\\n1962-01-01T00:00:00+00:00 229\\n1963-01-01T00:00:00+00:00 256\\n1964-01-01T00:00:00+00:00 278\\n1965-01-01T00:00:00+00:00 255\\n1966-01-01T00:00:00+00:00 251\\n1967-01-01T00:00:00+00:00 255\\n1968-01-01T00:00:00+00:00 265\\n1969-01-01T00:00:00+00:00 335\\n1970-01-01T00:00:00+00:00 328\\n1971-01-01T00:00:00+00:00 297\\n1972-01-01T00:00:00+00:00 288\\n1973-01-01T00:00:00+00:00 249\\n1974-01-01T00:00:00+00:00 242\\n1975-01-01T00:00:00+00:00 244\\n1976-01-01T00:00:00+00:00 236\\n1977-01-01T00:00:00+00:00 238\\n1978-01-01T00:00:00+00:00 255\\n1979-01-01T00:00:00+00:00 252\\n1980-01-01T00:00:00+00:00 254\\n1981-01-01T00:00:00+00:00 228\\n1982-01-01T00:00:00+00:00 233\\n1983-01-01T00:00:00+00:00 255\\n1984-01-01T00:00:00+00:00 230\\n1985-01-01T00:00:00+00:00 238\\n1986-01-01T00:00:00+00:00 241\\n1987-01-01T00:00:00+00:00 219\\n1988-01-01T00:00:00+00:00 182\\n1989-01-01T00:00:00+00:00 126\\n1990-01-01T00:00:00+00:00 109\\n1991-01-01T00:00:00+00:00 77\\n1992-01-01T00:00:00+00:00 59\\n1993-01-01T00:00:00+00:00 70\\n1994-01-01T00:00:00+00:00 52\\n1995-01-01T00:00:00+00:00 44\\n1996-01-01T00:00:00+00:00 37\\n1997-01-01T00:00:00+00:00 36\\n1998-01-01T00:00:00+00:00 28\\n1999-01-01T00:00:00+00:00 24\\n2000-01-01T00:00:00+00:00 23\\n2001-01-01T00:00:00+00:00 21\\n2002-01-01T00:00:00+00:00 14\\n2003-01-01T00:00:00+00:00 16\\n2004-01-01T00:00:00+00:00 35\\n2005-01-01T00:00:00+00:00 17\\n2006-01-01T00:00:00+00:00 11\\n2007-01-01T00:00:00+00:00 9\\n2008-01-01T00:00:00+00:00 7\\n2009-01-01T00:00:00+00:00 11\\n2010-01-01T00:00:00+00:00 12\\n2011-01-01T00:00:00+00:00 9\\n2012-01-01T00:00:00+00:00 7\\n2013-01-01T00:00:00+00:00 8\\n2014-01-01T00:00:00+00:00 6\\n\">, @options=Hamster::Hash[:title => \"Robert\", :with => \"lines\", :using => \"1:2\"]>], @cmd=\"plot \">, #<GnuplotRB::Plot:0x0000001e2afc38 @options=Hamster::Hash[:xdata => \"time\", :format_x => [\"%Y\"], :timefmt => \"%Y-%m-%dT%H:%M:%S\"], @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x0000001e2afb98 @type=:datablock, @data=#<GnuplotRB::Datablock:0x0000001e2af968 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 466\\n1952-01-01T00:00:00+00:00 451\\n1953-01-01T00:00:00+00:00 495\\n1954-01-01T00:00:00+00:00 423\\n1955-01-01T00:00:00+00:00 386\\n1956-01-01T00:00:00+00:00 406\\n1957-01-01T00:00:00+00:00 476\\n1958-01-01T00:00:00+00:00 529\\n1959-01-01T00:00:00+00:00 523\\n1960-01-01T00:00:00+00:00 559\\n1961-01-01T00:00:00+00:00 669\\n1962-01-01T00:00:00+00:00 867\\n1963-01-01T00:00:00+00:00 1120\\n1964-01-01T00:00:00+00:00 1172\\n1965-01-01T00:00:00+00:00 1530\\n1966-01-01T00:00:00+00:00 1664\\n1967-01-01T00:00:00+00:00 1761\\n1968-01-01T00:00:00+00:00 1843\\n1969-01-01T00:00:00+00:00 2490\\n1970-01-01T00:00:00+00:00 4022\\n1971-01-01T00:00:00+00:00 5359\\n1972-01-01T00:00:00+00:00 6208\\n1973-01-01T00:00:00+00:00 7227\\n1974-01-01T00:00:00+00:00 10654\\n1975-01-01T00:00:00+00:00 12929\\n1976-01-01T00:00:00+00:00 18373\\n1977-01-01T00:00:00+00:00 24844\\n1978-01-01T00:00:00+00:00 26104\\n1979-01-01T00:00:00+00:00 27779\\n1980-01-01T00:00:00+00:00 33920\\n1981-01-01T00:00:00+00:00 42526\\n1982-01-01T00:00:00+00:00 45443\\n1983-01-01T00:00:00+00:00 45278\\n1984-01-01T00:00:00+00:00 45849\\n1985-01-01T00:00:00+00:00 48346\\n1986-01-01T00:00:00+00:00 52667\\n1987-01-01T00:00:00+00:00 55985\\n1988-01-01T00:00:00+00:00 51530\\n1989-01-01T00:00:00+00:00 47882\\n1990-01-01T00:00:00+00:00 46466\\n1991-01-01T00:00:00+00:00 43395\\n1992-01-01T00:00:00+00:00 38351\\n1993-01-01T00:00:00+00:00 34984\\n1994-01-01T00:00:00+00:00 32116\\n1995-01-01T00:00:00+00:00 27938\\n1996-01-01T00:00:00+00:00 24191\\n1997-01-01T00:00:00+00:00 21043\\n1998-01-01T00:00:00+00:00 18231\\n1999-01-01T00:00:00+00:00 16345\\n2000-01-01T00:00:00+00:00 15704\\n2001-01-01T00:00:00+00:00 13916\\n2002-01-01T00:00:00+00:00 11912\\n2003-01-01T00:00:00+00:00 10445\\n2004-01-01T00:00:00+00:00 9469\\n2005-01-01T00:00:00+00:00 8107\\n2006-01-01T00:00:00+00:00 6809\\n2007-01-01T00:00:00+00:00 5701\\n2008-01-01T00:00:00+00:00 4731\\n2009-01-01T00:00:00+00:00 3791\\n2010-01-01T00:00:00+00:00 3192\\n2011-01-01T00:00:00+00:00 2620\\n2012-01-01T00:00:00+00:00 2323\\n2013-01-01T00:00:00+00:00 1945\\n2014-01-01T00:00:00+00:00 1779\\n\">, @options=Hamster::Hash[:title => \"Jessica\", :with => \"lines\", :using => \"1:2\"]>], @cmd=\"plot \">, #<GnuplotRB::Plot:0x0000001ebbc948 @options=Hamster::Hash[:xdata => \"time\", :format_x => [\"%Y\"], :timefmt => \"%Y-%m-%dT%H:%M:%S\"], @datasets=Hamster::Vector[#<GnuplotRB::Dataset:0x0000001ebbc768 @type=:datablock, @data=#<GnuplotRB::Datablock:0x0000001ebbc588 @stored_in_file=false, @data=\"1951-01-01T00:00:00+00:00 153\\n1952-01-01T00:00:00+00:00 111\\n1953-01-01T00:00:00+00:00 131\\n1954-01-01T00:00:00+00:00 112\\n1955-01-01T00:00:00+00:00 152\\n1956-01-01T00:00:00+00:00 121\\n1957-01-01T00:00:00+00:00 187\\n1958-01-01T00:00:00+00:00 227\\n1959-01-01T00:00:00+00:00 275\\n1960-01-01T00:00:00+00:00 262\\n1961-01-01T00:00:00+00:00 324\\n1962-01-01T00:00:00+00:00 485\\n1963-01-01T00:00:00+00:00 523\\n1964-01-01T00:00:00+00:00 470\\n1965-01-01T00:00:00+00:00 507\\n1966-01-01T00:00:00+00:00 589\\n1967-01-01T00:00:00+00:00 601\\n1968-01-01T00:00:00+00:00 546\\n1969-01-01T00:00:00+00:00 593\\n1970-01-01T00:00:00+00:00 582\\n1971-01-01T00:00:00+00:00 593\\n1972-01-01T00:00:00+00:00 485\\n1973-01-01T00:00:00+00:00 455\\n1974-01-01T00:00:00+00:00 387\\n1975-01-01T00:00:00+00:00 381\\n1976-01-01T00:00:00+00:00 366\\n1977-01-01T00:00:00+00:00 433\\n1978-01-01T00:00:00+00:00 412\\n1979-01-01T00:00:00+00:00 490\\n1980-01-01T00:00:00+00:00 642\\n1981-01-01T00:00:00+00:00 1232\\n1982-01-01T00:00:00+00:00 1160\\n1983-01-01T00:00:00+00:00 1195\\n1984-01-01T00:00:00+00:00 1083\\n1985-01-01T00:00:00+00:00 1097\\n1986-01-01T00:00:00+00:00 1060\\n1987-01-01T00:00:00+00:00 1122\\n1988-01-01T00:00:00+00:00 1163\\n1989-01-01T00:00:00+00:00 1058\\n1990-01-01T00:00:00+00:00 1125\\n1991-01-01T00:00:00+00:00 1259\\n1992-01-01T00:00:00+00:00 1353\\n1993-01-01T00:00:00+00:00 1498\\n1994-01-01T00:00:00+00:00 1613\\n1995-01-01T00:00:00+00:00 1763\\n1996-01-01T00:00:00+00:00 2513\\n1997-01-01T00:00:00+00:00 3639\\n1998-01-01T00:00:00+00:00 4304\\n1999-01-01T00:00:00+00:00 5422\\n2000-01-01T00:00:00+00:00 6562\\n2001-01-01T00:00:00+00:00 7158\\n2002-01-01T00:00:00+00:00 8663\\n2003-01-01T00:00:00+00:00 9682\\n2004-01-01T00:00:00+00:00 10915\\n2005-01-01T00:00:00+00:00 12667\\n2006-01-01T00:00:00+00:00 13495\\n2007-01-01T00:00:00+00:00 17014\\n2008-01-01T00:00:00+00:00 16073\\n2009-01-01T00:00:00+00:00 16925\\n2010-01-01T00:00:00+00:00 20612\\n2011-01-01T00:00:00+00:00 21816\\n2012-01-01T00:00:00+00:00 22267\\n2013-01-01T00:00:00+00:00 21147\\n2014-01-01T00:00:00+00:00 18490\\n\">, @options=Hamster::Hash[:title => \"Sophia\", :with => \"lines\", :using => \"1:2\"]>], @cmd=\"plot \">], @options=Hamster::Hash[:layout => [[2, 2]], :format_x => [\"%Y\"], :xlabel => [\"Year\"], :title => [\"Prevalence of certain names according to year\"], :ylabel => [\"Occurences\"], :xtics => [\"nomirror rotate by -45\"], :xrange => [\"\\\"1945-01-01\\\":\\\"2016-01-01\\\"\"]]>"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "plots = []\n",
    "pieces.each do |df|\n",
    "  plot = GnuplotRB::Plot.new([\n",
    "    df['births'], with: 'lines', title: df.name])\n",
    "  plot.format_x = '%Y'\n",
    "  plots << plot\n",
    "end\n",
    "\n",
    "GnuplotRB::Multiplot.new(*plots).tap do |mp|\n",
    "  mp.layout = [2,2]\n",
    "  mp.format_x = '%Y'\n",
    "  mp.xtics = 'nomirror rotate by -45'\n",
    "  mp.title = 'Prevalence of certain names according to year'\n",
    "  mp.xlabel = 'Year'\n",
    "  mp.ylabel = 'Occurences'\n",
    "  mp.xrange = '\"1945-01-01\":\"2016-01-01\"'\n",
    "end"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Ruby 2.2.1",
   "language": "ruby",
   "name": "ruby"
  },
  "language_info": {
   "file_extension": ".rb",
   "mimetype": "application/x-ruby",
   "name": "ruby",
   "version": "2.2.1"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}