Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Data | Valor | Modificar, % |
|---|---|---|
| 2014 | 92,4 | 1,95% |
| 2013 | 90,7 | -0,41% |
| 2012 | 91,0 | -0,38% |
| 2011 | 91,4 | -0,66% |
| 2010 | 92,0 | 0,24% |
| 2009 | 91,8 | -1,51% |
| 2008 | 93,2 | 0,92% |
| 2007 | 92,3 | -0,26% |
| 2006 | 92,6 | -0,10% |
| 2005 | 92,7 | -0,98% |
| 2004 | 93,6 | 1,51% |
| 2003 | 92,2 |