Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Data | Valor | Modificar, % |
|---|---|---|
| 2015 | 61,1 | 2,43% |
| 2014 | 59,7 | -6,41% |
| 2013 | 63,7 | -2,05% |
| 2012 | 65,1 | 0,23% |
| 2011 | 64,9 | -2,62% |
| 2010 | 66,7 | -1,10% |
| 2009 | 67,4 | -3,00% |
| 2008 | 69,5 | 0,33% |
| 2007 | 69,3 | -0,29% |
| 2006 | 69,5 | 1,32% |
| 2005 | 68,6 | -1,05% |
| 2004 | 69,3 |