Year	% of total electricity output
1990	10.2502662406816
1991	10.3344153393221
1992	12.2898249263304
1993	8.80748954735503
1994	7.90639364814041
1995	6.13211333172807
1996	7.68359020852221
1997	7.06913615156228
1998	6.19168787107718
1999	6.78995307756003
2000	6.87200638637573
2001	6.56905680109811
2002	6.65647493470922
2003	5.36369386464263
2004	5.60956888832033
2005	3.18081084604354
2006	3.03600704353634
2007	3.04698138901498
2008	3.97081282877991
2009	3.92466448629751
2010	3.24193826521814
2011	3.22635135135135
2012	3.71174299978294
2013	4.3521421107628
2014	4.01734999483631
2015	3.94814668769716