"jahr","anfragen","bewilligte_anlagen","durchschnittlicher_oelpreis_pro_1000_liter","bewilligte_erdsonden","bewilligte_erdkollektoren","sondenlaenge_km","heizleistung_kw","internet_clicks_durchschnitt_pro_monat"
"1991","28","28","","26","2","","",""
"1992","67","33","","26","7","","",""
"1993","99","26","","24","2","","",""
"1994","146","64","","51","13","","",""
"1995","133","33","284","29","4","","",""
"1996","247","48","335","46","2","6.6","31.3",""
"1997","310","59","339","58","1","8.34","36.4",""
"1998","321","70","290","69","1","9.12","53.61",""
"1999","214","45","348","45","0","5.27","51.8",""
"2000","227","32","531","32","0","3.81","40.1",""
"2001","165","25","501","25","0","3.39","38.74",""
"2002","179","26","448","26","0","3.65","40.7",""
"2003","327","53","475","53","0","7.42","51.5",""
"2004","317","54","533","54","0","7.61","52.2",""
"2005","550","75","735","75","0","11.67","77.5",""
"2006","697","104","818","104","0","21.35","99.82",""
"2007","816","132","850","132","0","27.71","139.12",""
"2008","997","164","1105","163","1","40.39","144.83",""
"2009","699","232","720","231","1","62.63","246.94",""
"2010","642","189","889","189","0","40.23","173.36",""
"2011","503","183","992","183","0","71.99","312.8",""
"2012","741","191","1049","191","0","70.74","315.1",""
"2013","608","183","1013","183","0","65.81","334.7",""
"2014","723","145","995","145","0","53.5","218.2",""
"2015","580","151","746","150","1","61.7","261",""
"2016","500","174","704","172","2","74.1","317.6","357"
"2017","555","143","789","143","0","77.92","334.8","546"
"2018","423","187","957","187","0","94.076","376.8","834"
"2019","338","167","914","166","1","78.78","355.1","999"
"2020","225","206","698","206","0","102.455","439.1","999"
"2021","310","220","867","220","0","100.6","435.5","999"