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	176000000
1972	209000000
1973	284000000
1974	249000000
1975	259000000
1976	335000000
1977	366000000
1978	409000000
1979	383000000
1980	385000000
1981	468000000
1982	537000000
1983	602000000
1984	292000000
1985	317000000
1986	374000000
1987	424000000
1988	448000000
1989	447000000
1990	590000000
1991	545000000
1992	551000000
1993	589000000
1994	638000000
1995	721000000
1996	853000000
1997	919000000
1998	1217000000
1999	1675000000
2000	1999000000
2001	2146000000
2002	2004000000
2003	1973000000
2004	2127000000
2005	2357000000
2006	3378000000
2007	4340000000
2008	4838000000
2009	5792000000
2010	6298000000
2011	6775000000
2012	7730000000
2013	7595000000
2014	7789000000
2015	7855000000