Year	kWh
1971	10000000
1972	7000000
1973	7000000
1974	7000000
1975	8000000
1976	8000000
1977	10000000
1978	8000000
1979	9000000
1980	10000000
1981	10000000
1982	10000000
1983	10000000
1984	10000000
1985	10000000
1986	10000000
1987	10000000
1988	10000000
1989	0
1990	0
1991	10000000
1992	485000000
1993	485000000
1994	485000000
1995	485000000
1996	544000000
1997	632000000
1998	685000000
1999	909000000
2000	1176000000
2001	1187000000
2002	1433000000
2003	1274000000
2004	1486000000
2005	1423000000
2006	1563000000
2007	1559000000
2008	1411000000
2009	1635000000
2010	1680000000
2011	1834000000
2012	2111000000
2013	2188000000
2014	2457000000
2015	2637000000