Year	% of total electricity output
1990	4.65608465608466
1991	4.54076367389061
1992	4.27756653992395
1993	4.33944069431051
1994	4.20560747663551
1995	4.06360424028269
1996	3.90689941812136
1997	3.71804802478699
1998	3.61890694239291
1999	3.57653791130186
2000	3.30423940149626
2001	3.276955602537
2002	12.9158512720157
2003	18.342644320298
2004	14.9293286219081
2005	12.6572327044025
2006	11.8491184911849
2007	8.32078313253012
2008	9.77713874910137
2009	10.2169349195241
2010	10.7282184655397
2011	10.6950174547763
2012	9.82608695652174
2013	10.4184217916316
2014	10.4172274562584
2015	10.417193426043