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| Company | Unit | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| Commerzbank | 1.25 | 3.36 | 3.96 | 4.55 | 2.12 | ||||||||||||
| Deutsche Bank | 6.59 | 5.95 | 5.26 | 3.31 | 1.50 | ||||||||||||
| DZ Bank | ... | ... | 8.93 | 12.6 | 9.62 | 8.69 | 4.95 | ... |
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