Year	kWh
1971	25000000
1972	23000000
1973	24000000
1974	24000000
1975	17000000
1976	25000000
1977	24000000
1978	25000000
1979	26000000
1980	27000000
1981	31000000
1982	43000000
1983	32000000
1984	29000000
1985	58000000
1986	73000000
1987	74000000
1988	72000000
1989	56000000
1990	158000000
1991	182000000
1992	191000000
1993	170000000
1994	163000000
1995	178000000
1996	225000000
1997	250000000
1998	320000000
1999	299000000
2000	431000000
2001	478000000
2002	452000000
2003	449000000
2004	470000000
2005	453000000
2006	446000000
2007	468000000
2008	486000000
2009	487000000
2010	553000000
2011	496000000
2012	505000000
2013	500000000
2014	505000000
2015	559000000