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| Company | Unit | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 |
| Commerzbank | 10.7 | 12.4 | 12.8 | 14.8 | 12.8 | |||||||||||||||||||||||||||
| Deutsche Bank | 13.6 | 14.6 | 18.1 | 15.8 | 15.9 | |||||||||||||||||||||||||||
| DZ Bank | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 10.4 | 12.1 | 15.2 | 15.8 | 13.1 |
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