Year	% of total electricity output
1990	0
1991	0
1992	0
1993	26.5873015873016
1994	60.377358490566
1995	60.2189781021898
1996	60.2150537634409
1997	56.9343065693431
1998	58.3629893238434
1999	58.023019634394
2000	57.3968466957397
2001	55.4577464788732
2002	58.4244372990354
2003	58.0238940910559
2004	57.818620066285
2005	58.3453030738294
2006	56.334386670497
2007	56.0318768892553
2008	55.2715654952077
2009	63.2727502615247
2010	71.3952685680159
2011	74.8355996933069
2012	75.0278335876988
2013	79.8432118205555
2014	81.198143559666
2015	81.2915257762837