Year	% of total electricity output
1990	45.5528580887221
1991	65.887484621407
1992	48.9215906537857
1993	47.7728983688833
1994	62.0198335803032
1995	61.3626563173782
1996	70.4555625167815
1997	57.1847220865488
1998	52.6540946394273
1999	56.5307852354165
2000	57.302672467371
2001	56.2289562289562
2002	46.0527351436442
2003	41.3735597331716
2004	54.9255234942793
2005	54.0706134640423
2006	51.4354252108644
2007	37.807891590275
2008	45.7084735153744
2009	56.0059835452506
2010	62.8413084617464
2011	47.0384204909285
2012	49.6743132257151
2013	66.5017566501757
2014	73.9580232211968
2015	66.8268375155722