Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Data | Valor | Modificar, % |
|---|---|---|
| 2014 | 75,3 | -3,68% |
| 2013 | 78,2 | -1,29% |
| 2012 | 79,3 | -0,37% |
| 2011 | 79,6 | -1,12% |
| 2010 | 80,5 | 1,88% |
| 2009 | 79,0 | -2,33% |
| 2008 | 80,9 | -0,66% |
| 2007 | 81,4 | -0,75% |
| 2006 | 82,0 | -1,53% |
| 2005 | 83,3 | -0,34% |
| 2004 | 83,6 | -1,44% |
| 2003 | 84,8 |