Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Data | Valor | Modificar, % |
|---|---|---|
| 2015 | 85,3 | 1,07% |
| 2014 | 84,4 | -2,13% |
| 2013 | 86,3 | -0,67% |
| 2012 | 86,9 | -1,66% |
| 2011 | 88,3 | -1,87% |
| 2010 | 90,0 | 1,26% |
| 2009 | 88,9 | -1,16% |
| 2008 | 89,9 | -1,11% |
| 2007 | 90,9 | -0,05% |
| 2006 | 91,0 | 0,06% |
| 2005 | 90,9 | -2,53% |
| 2004 | 93,3 |