Year kWh 1990 0 1991 0 1992 0 1993 0 1994 0 1995 6000000 1996 5000000 1997 8000000 1998 12000000 1999 12000000 2000 13000000 2001 11000000 2002 24000000 2003 36000000 2004 38000000 2005 89000000 2006 116000000 2007 124000000 2008 169000000 2009 509000000 2010 1017000000 2011 1149000000 2012 1435000000 2013 1194000000 2014 1362000000 2015 1475000000