Year	% of total electricity output
1990	48.1436642453592
1991	46.3205080313784
1992	50.6675567423231
1993	50.3692762186115
1994	44.9081803005008
1995	40.0493218249075
1996	41.850443599493
1997	37.9302587176603
1998	22.9282435370863
1999	22.3755119637853
2000	36.967565455256
2001	38.8568991256131
2002	41.6535122336227
2003	38.2488479262673
2004	42.9310037439829
2005	49.8171542553192
2006	53.9422452952628
2007	56.5557118299734
2008	61.4768951978254
2009	75.4738655944859
2010	67.6786424499536
2011	76.1856505877584
2012	72.3630264629146
2013	72.0421327672083
2014	62.3649078194533
2015	58.8541014402004