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	1000000
1998	27000000
1999	21000000
2000	6000000
2001	3000000
2002	2000000
2003	3000000
2004	3000000
2005	5000000
2006	7000000
2007	14000000
2008	21000000
2009	33000000
2010	27000000
2011	44000000
2012	218000000
2013	387000000
2014	521000000
2015	782000000