Year	kWh
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	1000000
2005	5000000
2006	20000000
2007	47000000
2008	138000000
2009	248000000
2010	731000000
2011	1018000000
2012	2101000000
2013	2845000000
2014	2783000000
2015	3107000000