Year	kWh
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
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	1000000
1988	1000000
1989	1000000
1990	2000000
1991	2000000
1992	9000000
1993	48000000
1994	38000000
1995	35000000
1996	38000000
1997	36000000
1998	70000000
1999	163000000
2000	451000000
2001	835000000
2002	777000000
2003	1126000000
2004	1246000000
2005	1389000000
2006	1814000000
2007	2003000000
2008	2438000000
2009	2811000000
2010	3062000000
2011	4132000000
2012	5748000000
2013	8003000000
2014	7701000000
2015	8752000000