DEZA`s ROA reached 10.3 % in 2015. This is 12.3 % less than in the previous year.
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| Company | Unit | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| DEZA | % | ... | 8.66 | 24.3 | 20.6 | 14.0 | 9.46 | |||||||||||
| Explosia | % | ... | ... | ... | -9.88 | -5.27 | -9.03 | -4.14 | -2.76 | |||||||||
| LARS Chemie | % | ... | ... | ... | ... | ... | ... | ... | ... | 7.87 | 11.3 | 5.28 | 7.12 | 8.85 | ... | |||
| Lovochemie | % | 4.66 | 14.0 | 16.1 | 10.7 | 6.72 | ||||||||||||
| Precheza | % | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 8.07 | 17.5 | 31.9 | 28.0 | 7.46 | ... | |
| SPOLANA | % | ... | ... | ... | ... | -13.9 | -2.51 | -34.4 | -10.7 | -34.4 | ... | |||||||
| Spolchemie | % | ... | ... | ... | ... | ... | ... | ... | ... | -7.15 | 1.08 | 1.19 | -3.31 | -3.93 | ... | |||
| Synthos Kralupy | % | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 4.53 | 18.4 | 22.6 | 11.7 | 5.13 | ... |
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