1990/94=12,101; 1991/95=12,1001; 1992/96=12,3100; 1993/97=12,5501; 1994/98=12,8001; 1995/99=13,2001; 1996/2000=13,5201; 1997/2001=13,8201; 1998/2002=13,11101; 1999/2003=14,1401; 2000/04=14,4001; 2001/05=14,6801; 2002/06=14,9751; 2003/07=15,1501; 2004/08=15,3661; 2005/09=16,751; 2006/10=16,2301; 2007/11=16,6001; 2008/12=16,9901; 2009/13=16,13601; 2010/14=17,2501; 2011/15=17,6601; 2012/16=17,10201; 2013/17=17,14301; 2014/18=18,2001; 2015/19=18,5501; 2019/23=19,11801; 2020/2024=19,22601; 2021/2025=19,31501 von: Deutschland. Deutscher Bundestag: [Verhandlungen des Deutschen Bundestages / Drucksachen] (ISSN: 0722-8333)