Year	kWh
1971	12000000
1972	12000000
1973	12000000
1974	12000000
1975	12000000
1976	12000000
1977	12000000
1978	12000000
1979	12000000
1980	12000000
1981	12000000
1982	12000000
1983	12000000
1984	12000000
1985	15000000
1986	20000000
1987	16000000
1988	16000000
1989	16000000
1990	17000000
1991	17000000
1992	0
1993	0
1994	0
1995	0
1996	0
1997	1000000
1998	27000000
1999	21000000
2000	6000000
2001	2000000
2002	1000000
2003	1000000
2004	1000000
2005	3000000
2006	750000000
2007	146000000
2008	177000000
2009	163000000
2010	185000000
2011	234000000
2012	449000000
2013	689000000
2014	828000000
2015	1087000000