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	1000000
1991	1000000
1992	1000000
1993	1000000
1994	1000000
1995	1000000
1996	1000000
1997	3000000
1998	3000000
1999	62000000
2000	264000000
2001	503000000
2002	477000000
2003	652000000
2004	833000000
2005	890000000
2006	981000000
2007	1319000000
2008	1474000000
2009	1933000000
2010	2828000000
2011	3082000000
2012	3143000000
2013	4509000000
2014	5845000000
2015	6643000000