Year	kWh
1971	1299000000
1972	1429000000
1973	1691000000
1974	2067000000
1975	2584000000
1976	3124000000
1977	3402000000
1978	3705000000
1979	4404000000
1980	4304000000
1981	4784000000
1982	5708000000
1983	6563000000
1984	6415000000
1985	6560000000
1986	8447000000
1987	9898000000
1988	10005000000
1989	10375000000
1990	11997000000
1991	14065000000
1992	17267000000
1993	17631000000
1994	17935000000
1995	18906000000
1996	19242000000
1997	19774000000
1998	19449000000
1999	20520000000
2000	20981000000
2001	23943000000
2002	25408000000
2003	28181000000
2004	29861000000
2005	32729000000
2006	33192000000
2007	39744000000
2008	40923000000
2009	45858000000
2010	58094000000
2011	62346000000
2012	71827000000
2013	82663000000
2014	100061000000
2015	120698000000