Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| Fecha | Valor | Cambiar , % |
|---|---|---|
| 2014 | 71,0 | 1,19 % |
| 2013 | 70,2 | -2,74 % |
| 2012 | 72,2 | -3,81 % |
| 2011 | 75,0 | 2,57 % |
| 2010 | 73,2 | 0,19 % |
| 2009 | 73,0 | -4,10 % |
| 2008 | 76,1 | -2,03 % |
| 2007 | 77,7 | 7,23 % |
| 2006 | 72,5 | -0,66 % |
| 2005 | 73,0 | -1,37 % |
| 2004 | 74,0 | -0,15 % |
| 2003 | 74,1 |