Year	kWh
1971	49000000
1972	50000000
1973	50000000
1974	51000000
1975	51000000
1976	51000000
1977	52000000
1978	52000000
1979	52000000
1980	52000000
1981	52000000
1982	54000000
1983	54000000
1984	54000000
1985	57000000
1986	62000000
1987	59000000
1988	59000000
1989	59000000
1990	61000000
1991	61000000
1992	45000000
1993	45000000
1994	45000000
1995	46000000
1996	47000000
1997	49000000
1998	76000000
1999	71000000
2000	60000000
2001	66000000
2002	73000000
2003	68000000
2004	62000000
2005	75000000
2006	84000000
2007	77000000
2008	89000000
2009	113000000
2010	153000000
2011	181000000
2012	322000000
2013	640000000
2014	803000000
2015	1105000000