Clean energy is noncarbohydrate energy that does not produce carbon dioxide when generated. It includes hydropower and nuclear, geothermal, and solar power, among others.
| Fecha | Valor | Cambiar , % |
|---|---|---|
| 2014 | 17,8 | -0,91 % |
| 2013 | 17,9 | -3,92 % |
| 2012 | 18,7 | 0,77 % |
| 2011 | 18,5 | 2,84 % |
| 2010 | 18,0 | -0,62 % |
| 2009 | 18,1 | 3,24 % |
| 2008 | 17,6 | -11,43 % |
| 2007 | 19,8 | 2,82 % |
| 2006 | 19,3 | 1,21 % |
| 2005 | 19,1 | -1,33 % |
| 2004 | 19,3 | 19,68 % |
| 2003 | 16,1 |