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	13000000
1978	15000000
1979	16000000
1980	15000000
1981	18000000
1982	18000000
1983	17000000
1984	19000000
1985	18000000
1986	17000000
1987	22000000
1988	23000000
1989	19000000
1990	13000000
1991	14000000
1992	12000000
1993	15000000
1994	15000000
1995	19000000
1996	15000000
1997	20000000
1998	28000000
1999	37000000
2000	49000000
2001	50000000
2002	51000000
2003	61000000
2004	91000000
2005	117000000
2006	135000000
2007	148000000
2008	151000000
2009	161000000
2010	159000000
2011	184000000
2012	209000000
2013	251000000
2014	291000000
2015	332000000