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	1000000
1991	1000000
1992	1000000
1993	1000000
1994	1000000
1995	1000000
1996	1000000
1997	3000000
1998	3000000
1999	27000000
2000	227000000
2001	459000000
2002	436000000
2003	613000000
2004	775000000
2005	808000000
2006	846000000
2007	1166000000
2008	1262000000
2009	1631000000
2010	2515000000
2011	2561000000
2012	2436000000
2013	3534000000
2014	4457000000
2015	5117000000