Year	% of total electricity output
1990	53.8373612018289
1991	70.9733981263464
1992	82.6946295219783
1993	81.6647919010124
1994	74.2651422241563
1995	72.4051807185928
1996	60.4529333289949
1997	62.134726852269
1998	48.1708862541891
1999	38.0307371711383
2000	48.5478317281301
2001	54.2615974230561
2002	55.4509857800371
2003	50.1569540242158
2004	46.9008748633026
2005	53.8830881792546
2006	55.2548806941432
2007	44.1555999931634
2008	45.7490285408013
2009	48.8274431013471
2010	40.2025349968561
2011	39.596426886613
2012	36.4453556221416
2013	35.6668719633203
2014	42.4070089148478
2015	43.6043349649144