Year	% of total electricity output
1990	5.09273903666427
1991	8.67582463699186
1992	5.94224311618536
1993	6.10955240317802
1994	6.53029890294941
1995	8.62974890433182
1996	10.3416566456815
1997	9.05017093227386
1998	8.20051970550022
1999	9.62648041299727
2000	7.75666822648573
2001	5.52415404325872
2002	6.63082769487441
2003	10.1752871081945
2004	10.0624011698094
2005	10.7796119608932
2006	12.7602652087938
2007	7.32566854299884
2008	9.1397507629705
2009	13.3973876321734
2010	18.3415552495337
2011	13.7615764212803
2012	16.7036909052015
2013	25.1234373358546
2014	24.1880698408915
2015	28.6557832580757