Year	% of total electricity output
1990	0
1991	95.1763858891289
1992	98.2051282051282
1993	82.8620394173093
1994	76.8878718535469
1995	96.8403074295474
1996	95.6326987681971
1997	95.0155763239875
1998	97.3503434739941
1999	96.6914805624483
2000	99.2181947405828
2001	100
2002	99.5801259622113
2003	99.8592540464462
2004	99.1298042059463
2005	99.7590361445783
2006	94.1469489414695
2007	97.8426395939086
2008	88.7404580152672
2009	94.5637583892618
2010	95.5555555555556
2011	98.1818181818182
2012	97.8088861838101
2013	95.5672426746807
2014	99.13217623498
2015	97.7864583333333