ENEA`s ROA reached -2.12 % in 2015. This is 140 % less than in the previous year.
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| Company | Unit | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| ENEA | % | ... | ... | 4.24 | 5.10 | 5.89 | 4.97 | 4.66 | |||
| PGE | % | 6.63 | 5.52 | 8.69 | 6.26 | 6.69 | |||||
| Tauron Polska Energia | % | ... | 3.60 | 3.77 | 4.79 | 4.94 | 4.11 |
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