1991=12,1150; 1992=12,3250; 1993=12,5650; 1994=12,8490; 1995=13,2600; 1996=13,5700; 1997=13,8550; 1998=14,29; 1999=14,1667; 2000=14,4226; 2001=14,7018; 2002=15,60; 2003=15,2020; 2004=15,4200; 2005=16,160; 2006=16/3200; 2007=16/7100; 2008=16,11000; 2009=17,77; 2010=17,3650; 2011=17,7600; 2012=17,11330; 2013=18,111; 2014=18,3300; 2015=18,8100; 2016,[1]=18,10200; 2016,2=18,11990; 2017=19,170; 2017,Erg.-Bd.=19,1800; 2018=19,5500; 2018,Erg.-Bd.=19,9100; 2019=19,15700; 2019,Erg.-Bd=19,18300; 2020=19,25350 von: Deutschland. Deutscher Bundestag: [Verhandlungen des Deutschen Bundestages / Drucksachen] (ISSN: 0722-8333)