Year	% of total electricity output
1990	4.45646757314729
1991	5.973765356566
1992	5.79331648413367
1993	5.11092981024818
1994	3.84968400073427
1995	5.53734236282275
1996	6.83350500983238
1997	6.46160343492645
1998	7.46570884458694
1999	7.24111628396328
2000	6.57629287014712
2001	3.98998483943584
2002	5.20287414925656
2003	7.15601965601966
2004	7.64978515907884
2005	9.87446556899845
2006	9.35783042503626
2007	6.80299042783613
2008	6.64363897362282
2009	8.77279913168637
2010	12.5779603190125
2011	7.86638146452632
2012	11.4364842525602
2013	16.0788502170935
2014	15.7436017644426
2015	17.9885929998769