Year	% of total electricity output
1990	7.56712774613507
1991	6.73575129533679
1992	4.47611902975744
1993	5.24927459773147
1994	5.50785340314136
1995	5.16383599245154
1996	5.87943027492547
1997	5.9312549960032
1998	4.92283950617284
1999	4.8267513996066
2000	4.84408113835907
2001	3.45552884615385
2002	2.24978367464667
2003	2.51889168765743
2004	3.28391298323403
2005	3.69172729722447
2006	3.94754449350997
2007	4.96997998665777
2008	6.13931523022432
2009	7.36698499317872
2010	7.68518518518519
2011	8.72652313330279
2012	10.924158714214
2013	9.84222389181067
2014	9.79631425800194
2015	10.2620087336245