Year	kWh
1971	38000000
1972	35000000
1973	40000000
1974	42000000
1975	34000000
1976	38000000
1977	36000000
1978	20000000
1979	38000000
1980	41000000
1981	46000000
1982	27000000
1983	33000000
1984	37000000
1985	37000000
1986	28000000
1987	30000000
1988	28000000
1989	22000000
1990	19000000
1991	16000000
1992	14000000
1993	28000000
1994	16000000
1995	26000000
1996	32000000
1997	36000000
1998	36000000
1999	36000000
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0