"year","semestre","proporcion"
"2003","2","0.83448988"
"2004","1","0.86979437"
"2004","2","0.83938098"
"2005","1","0.85292619"
"2005","2","0.86060274"
"2006","1","0.86137855"
"2006","2","0.86484468"
"2007","1","0.85759294"
"2007","2","0.84708565"
"2008","1","0.8563301"
"2008","2","0.84598428"
"2009","1","0.85154271"
"2009","2","0.84911126"
"2010","1","0.84853339"
"2010","2","0.84935266"
"2011","1","0.84408021"
"2011","2","0.84314555"
"2012","1","0.84370553"
"2012","2","0.84162307"
"2013","1","0.83582205"
"2013","2","0.83463717"
"2014","1","0.82449538"
"2014","2","0.8219654"
"2015","1","0.81416708"
"2015","2",
"2016","1",
"2016","2","0.79140258"
"2017","1","0.79078758"
"2017","2","0.79113472"
"2018","1","0.78741938"
"2018","2","0.77866054"
"2019","1","0.77605569"
"2019","2","0.76410025"
"2020","1","0.74295616"
"2020","2","0.73473763"
"2021","1","0.79624498"
"2021","2","0.80232561"
"2022","1","0.79362082"
"2022","2","0.80095458"
"2023","1","0.79830462"