Year Kilowatt-hours 1985 17794.34597 1986 17959.72845 1987 18736.70999 1988 18775.9005 1989 18126.58241 1990 17267.37896 1991 17925.72875 1992 18132.87956 1993 18273.63948 1994 18872.95707 1995 18797.77115 1996 19110.0357 1997 19029.09894 1998 18514.39854 1999 18818.28932 2000 19496.50006 2001 18753.74782 2002 18991.47882 2003 18345.8821 2004 18376.23516 2005 18986.63218 2006 18425.21368 2007 18944.9209 2008 18789.95639 2009 17881.11932 2010 17461.90399 2011 18198.75732 2012 18022.8451 2013 18470.59586 2014 18217.52437 2015 18144.23588 2016 18269.8609