Year	% of total electricity output
1990	12.6713751557956
1991	13.3188484519283
1992	9.91871591727544
1993	4.47023208879919
1994	7.32345248474281
1995	5.05292755540853
1996	15.6085500079758
1997	15.3240638563967
1998	13.7029611351018
1999	6.39782861574254
2000	6.07945269377284
2001	7.1580486508042
2002	6.85264194289465
2003	10.0072385088672
2004	10.2061564529794
2005	6.14307931570762
2006	5.94542891663311
2007	6.00090465899382
2008	5.96789883268483
2009	13.993851974462
2010	17.4340993578912
2011	10.78941054147
2012	8.62996158770807
2013	14.6479584475545
2014	12.3878104779795
2015	14.3088903309539