Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Data | Valor | Modificar, % |
|---|---|---|
| 2015 | 79,9 | 1,73% |
| 2014 | 78,6 | -1,72% |
| 2013 | 80,0 | -2,72% |
| 2012 | 82,2 | -2,68% |
| 2011 | 84,5 | -0,19% |
| 2010 | 84,6 | -0,26% |
| 2009 | 84,9 | -2,29% |
| 2008 | 86,8 | -1,52% |
| 2007 | 88,2 | -1,13% |
| 2006 | 89,2 | -0,68% |
| 2005 | 89,8 | -0,67% |
| 2004 | 90,4 |