Year % of total electricity output 1990 0.838301043219076 1991 1.68924762179302 1992 1.08826424587116 1993 1.81827547130936 1994 0.834884071820148 1995 0.9789500380421 1996 0.653626416190568 1997 0.348885891054566 1998 0.924254148396527 1999 0.81997010946399 2000 0.212498032425626 2001 0.259154929577465 2002 0.206163194444444 2003 0.896148253356329 2004 0.8032 2005 1.63644405130473 2006 0.618861068528928 2007 0.607592214216582 2008 0.703350233621632 2009 0.794784551050622 2010 0.380460926225565 2011 0.980009370607528 2012 1.08368033172465 2013 0.55101018533979 2014 0.395379969490365 2015 0.322683798947644