Year	kWh
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	2000000
1970	13000000
1971	38000000
1972	45000000
1973	50000000
1974	32000000
1975	35000000
1976	44000000
1977	40000000
1978	45000000
1979	75000000
1980	77000000
1981	171000000
1982	220000000
1983	225000000
1984	223000000
1985	250000000
1986	298000000
1987	322000000
1988	332000000
1989	328000000
1990	461000000
1991	473000000
1992	429000000
1993	434000000
1994	432000000
1995	483000000
1996	583000000
1997	640000000
1998	994000000
1999	1454000000
2000	1774000000
2001	1947000000
2002	1916000000
2003	1898000000
2004	2001000000
2005	2213000000
2006	3204000000
2007	4183000000
2008	4716000000
2009	5589000000
2010	6118000000
2011	6546000000
2012	7446000000
2013	7318000000
2014	7521000000
2015	7561000000