Year	% of total electricity output
1990	6.0377143616365
1991	3.07889276411637
1992	2.49107745731648
1993	2.95731813891705
1994	1.45211542741277
1995	1.66281143210463
1996	1.3968065941117
1997	1.30338474837246
1998	2.01000606287806
1999	1.80690673865431
2000	1.4248282650437
2001	1.37738284320544
2002	1.04122448484554
2003	1.49275476338249
2004	1.26318832989646
2005	1.04466914513476
2006	0.99883163049693
2007	1.06995691527453
2008	0.985727672457291
2009	1.03769073406601
2010	1.24537463913126
2011	1.43812265288346
2012	1.33594507802273
2013	1.63285870185595
2014	1.56686805919401
2015	1.89466631222848