| Year | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 |
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| Specification | |||||||||||||||||||
| Total |
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| Thermal solar panels |
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| Heat pumps (theroretical thermal power) |
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Biogas stations![]() |
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| Heating wood stations |
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