Year	% of total electricity output
1990	79.3969849246231
1991	74.5726495726496
1992	75.886524822695
1993	75.2747252747253
1994	82.9181494661922
1995	51.1111111111111
1996	44.9586776859504
1997	33.0578512396694
1998	46.1538461538462
1999	58.0229226361031
2000	51.7367458866545
2001	47.6430976430976
2002	47.5319926873857
2003	47.6635514018692
2004	47.5319926873857
2005	47.6618705035971
2006	47.5438596491228
2007	32.9059829059829
2008	37.2427983539095
2009	28.7101248266297
2010	30.1533219761499
2011	12.8313891834571
2012	20.0909090909091
2013	13.3649289099526
2014	8.71248789932236
2015	7.99614643545279