Year	% of energy use
1990	-23.86145807899074
1991	-22.5821206596808
1992	-13.535379127292602
1993	-20.21833437821137
1994	-22.460772312041044
1995	-22.216077461955564
1996	-40.476057234539994
1997	-65.9785087407463
1998	-64.75228408025589
1999	-84.07335560429826
2000	-120.22781539974858
2001	-143.2039281612493
2002	-129.66699538103714
2003	-136.59655240781933
2004	-125.823567869972
2005	-133.19090035654204
2006	-108.154681645361
2007	-100.04402114419145
2008	-106.77516033008838
2009	-133.24237745071744
2010	-126.95815842250546
2011	-107.23476107278029
2012	-122.88271943699816
2013	-107.34155528830487
2014	-116.89042676014245