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 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 1000000 2002 1000000 2003 2000000 2004 2000000 2005 2000000 2006 3000000 2007 10000000 2008 2000000 2009 4000000 2010 4000000 2011 5000000 2012 5000000 2013 5000000 2014 5000000 2015 5000000