Clean energy is noncarbohydrate energy that does not produce carbon dioxide when generated. It includes hydropower and nuclear, geothermal, and solar power, among others.
| Date | Valeur | Modifier , % |
|---|---|---|
| 2015 | 49,1 | -1,07 % |
| 2014 | 49,6 | 6,77 % |
| 2013 | 46,4 | -0,01 % |
| 2012 | 46,5 | -2,66 % |
| 2011 | 47,7 | 6,09 % |
| 2010 | 45,0 | 1,68 % |
| 2009 | 44,2 | -2,32 % |
| 2008 | 45,3 | 0,01 % |
| 2007 | 45,3 | -0,89 % |
| 2006 | 45,7 | 1,68 % |
| 2005 | 44,9 | -0,33 % |
| 2004 | 45,1 |