Fossil fuel comprises coal, oil, petroleum, and natural gas products.
| तिथि | मान | बदले , % |
|---|---|---|
| 2014 | 86.8 | 0.25% |
| 2013 | 86.6 | -0.67% |
| 2012 | 87.2 | 0.13% |
| 2011 | 87.0 | -0.48% |
| 2010 | 87.5 | -0.24% |
| 2009 | 87.7 | -0.54% |
| 2008 | 88.1 | 0.49% |
| 2007 | 87.7 | 0.69% |
| 2006 | 87.1 | -0.05% |
| 2005 | 87.2 | 0.19% |
| 2004 | 87.0 | 1.13% |
| 2003 | 86.0 |