Year	% of total electricity output
1990	47.0588235294118
1991	24.5283018867925
1992	35.0877192982456
1993	37.0967741935484
1994	32.8125
1995	29.3628808864266
1996	27.6315789473684
1997	27.6807980049875
1998	25.9389671361502
1999	19.4413407821229
2000	26.5524625267666
2001	18.7246963562753
2002	21.6110019646365
2003	19.1312384473198
2004	22.4523612261806
2005	19.3621867881549
2006	17.2747580044676
2007	16.0878809355067
2008	17.0258620689655
2009	18.3544303797468
2010	17.5
2011	21.3734142305571
2012	17.9804372842348
2013	17.9856115107914
2014	15.8750317500635
2015	15.6626506024096