Year	% of total electricity output
1990	99.3914807302231
1991	100
1992	99.0654205607477
1993	99.171270718232
1994	99.3827160493827
1995	99.4350282485876
1996	99.5633187772926
1997	99.5584988962472
1998	99.4186046511628
1999	85.5855855855856
2000	99.6621621621622
2001	100
2002	100
2003	85.7142857142857
2004	83.1234256926952
2005	81.986143187067
2006	82.1192052980132
2007	82.3095823095823
2008	81.3449023861171
2009	61.2244897959184
2010	54.719387755102
2011	61.1755607115236
2012	58.0588235294118
2013	56.8168519602106
2014	54.7126436781609
2015	53.3448673587082