ENEA`s Operating Cost Growth reached 92.3 % in 2015. This is 3216 % less than in the previous year.
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| Company | Unit | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| ENEA | % | ... | ... | 7.53 | 3.39 | 10.5 | 4.67 | -45.4 | ||
| PGE | % | 3.03 | 4.22 | 5.80 | 34.8 | -31.3 | ||||
| Tauron Polska Energia | % | ... | 1.85 | 17.1 | -2.60 | 22.6 | 52.9 |
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