Year	% of total electricity output
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	11.3273771537971
2011	12.101020956475
2012	14.9152542372881
2013	14.9121861868333
2014	15.0992799476326
2015	14.8561614426793