Year	% of total electricity output
1990	0.0143554407120299
1991	0.0278888165845496
1992	0.115335666560611
1993	0.0999423409571401
1994	0.080917534477906
1995	0.0821692686935086
1996	0.0737757830991977
1997	0.0712250712250712
1998	0.0658674746410223
1999	0.0841514726507714
2000	0.0726659009399686
2001	0.0455052217241929
2002	0.0703296703296703
2003	0.091409621394103
2004	0.0824890543370207
2005	0.0802436113740175
2006	0.0494481585505756
2007	0.0446162998215348
2008	0.0561383811094348
2009	0.179973821989529
2010	0.290146950896895
2011	0.504365019521105
2012	0.76821738647366
2013	0.931150321255015
2014	1.5144788120961
2015	1.89020023043627