Year	% of total electricity output
1990	0.685750457166971
1991	0.727563995594567
1992	0.643837778128452
1993	0.622816345131399
1994	0.614650156646278
1995	0.643776824034335
1996	0.7324023938444
1997	0.759951408311439
1998	0.578112395805324
1999	0.650243180376401
2000	0.690517461851041
2001	0.705753123712756
2002	0.655474735182676
2003	0.98403865866159
2004	2.77678889284443
2005	5.22989148674348
2006	4.16352937895647
2007	4.71221221221221
2008	5.88881948782011
2009	8.06227024618469
2010	8.08113242888871
2011	7.51825425469891
2012	7.6396708531832
2013	9.20314253647587
2014	10.6831790963527
2015	10.5826906598115