Year	kWh
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	3000000
2000	11000000
2001	11000000
2002	14000000
2003	14000000
2004	15000000
2005	20000000
2006	21000000
2007	20000000
2008	27000000
2009	43000000
2010	103000000
2011	143000000
2012	188000000
2013	281000000
2014	333000000
2015	421000000