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	493000000
2002	466000000
2003	640000000
2004	822000000
2005	879000000
2006	971000000
2007	1309000000
2008	1458000000
2009	1858000000
2010	2688000000
2011	2800000000
2012	2665000000
2013	3830000000
2014	4560000000
2015	5056000000