Year	% of total electricity output
1990	20.8993985784582
1991	37.272397533551
1992	52.2298850574713
1993	71.1451758340848
1994	81.5032987747408
1995	82.7766416723472
1996	70.2452316076294
1997	53.1089560752995
1998	50.2038118321031
1999	54.4809927122316
2000	48.8445680314508
2001	48.702763677383
2002	48.8456189151599
2003	39.9520681697142
2004	46.9751728472659
2005	47.595619742898
2006	44.0078142610264
2007	33.9528173794976
2008	32.834109154692
2009	39.8200153178453
2010	46.8698902125672
2011	28.7107329842932
2012	29.93182786536
2013	41.4646725116039
2014	36.7264851485149
2015	35.5173075692623