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	95.0207468879668
2008	94.5378151260504
2009	94.2253521126761
2010	94.5569620253165
2011	94.6058091286307
2012	95.6926658905704
2013	96.0140679953107
2014	93.9613526570049
2015	96.8571428571428