Year	% of total electricity output
1990	15.0067554526153
1991	16.2463219840269
1992	33.8071968014216
1993	68.196981731533
1994	62.1067515022976
1995	34.508181981658
1996	25.2977148374638
1997	23.0552330403052
1998	24.8263608463899
1999	20.9900297358755
2000	21.1648204095334
2001	16.8494342906876
2002	30.0416742163435
2003	36.0298127613161
2004	33.134328358209
2005	28.0671204685769
2006	30.7187342198283
2007	31.4682943370634
2008	31.1785095320624
2009	35.6727208605184
2010	39.4854413803728
2011	33.5397039030956
2012	28.9447486311598
2013	28.2360570687419
2014	25.7548387096774
2015	28.3369662777279