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	13000000
1972	22000000
1973	26000000
1974	8000000
1975	18000000
1976	19000000
1977	16000000
1978	20000000
1979	49000000
1980	50000000
1981	140000000
1982	177000000
1983	193000000
1984	194000000
1985	192000000
1986	225000000
1987	248000000
1988	260000000
1989	272000000
1990	300000000
1991	283000000
1992	230000000
1993	256000000
1994	260000000
1995	290000000
1996	346000000
1997	375000000
1998	655000000
1999	1136000000
2000	1323000000
2001	1451000000
2002	1433000000
2003	1406000000
2004	1485000000
2005	1662000000
2006	2633000000
2007	3580000000
2008	4038000000
2009	4553000000
2010	4465000000
2011	4702000000
2012	5209000000
2013	5248000000
2014	5247000000
2015	5014000000