Year	% of total electricity output
1990	3.52079189353908
1991	4.20516614176904
1992	3.12424450195587
1993	4.8056663242029
1994	5.97790965552283
1995	5.13515047389086
1996	4.72248816916049
1997	5.54249659779785
1998	9.11807977016554
1999	8.33236402549667
2000	6.58613058989076
2001	6.97210117879898
2002	5.55907634871984
2003	5.14350084346977
2004	6.47475690820194
2005	6.67032429146967
2006	6.68674605269286
2007	5.39360308992056
2008	6.13803703280612
2009	6.97965084466562
2010	7.09163895185036
2011	5.74512177606336
2012	5.66335455704945
2013	7.80099738779387
2014	5.58703118560242
2015	4.38164680336566