Year	% of total electricity output
1990	74.0890688259109
1991	71.875
1992	75.812274368231
1993	73.5785953177257
1994	78.6231884057971
1995	72.1153846153846
1996	63.2835820895522
1997	58.5677749360614
1998	31.9502074688797
1999	30.6878306878307
2000	30.359355638166
2001	38.9189189189189
2002	45.1552210724365
2003	51.5126737530662
2004	51.4883346741754
2005	50.5900865460267
2006	48.7621905476369
2007	46.6997870830376
2008	44.9696151249156
2009	72.4608560165516
2010	53.7956068791505
2011	52.6273499200104
2012	57.4928440366973
2013	64.7933030451541
2014	42.8744112375474
2015	43.5163551401869