Year	% of energy use
1971	-124.871746636411
1972	-235.7210791435138
1973	-282.70327484037284
1974	-248.76394242582168
1975	-188.0132614923704
1976	-169.3570772798375
1977	-140.3691301093979
1978	-114.63751658772816
1979	-91.33041737210868
1980	-78.56912894554587
1981	-75.88078837891292
1982	-74.89756562934454
1983	-87.89888701955198
1984	-85.96742730225048
1985	-87.48358653748858
1986	-95.33111465219487
1987	-100.57189046453527
1988	-100.84994827118219
1989	-93.46845205846904
1990	-88.58595620685124
1991	-87.71376814960007
1992	-77.4394579960631
1993	-70.52768121239883
1994	-67.48807344427124
1995	-54.59732955626134
1996	-40.34574271604657
1997	-25.586355683519592
1998	-25.30671422885072
1999	-14.104102085982712
2000	-36.80801302477374
2001	-87.05348264605165
2002	-77.02814701615227
2003	-91.66051052332617
2004	-149.93342878601862
2005	-168.39727789843192
2006	-126.309987330084
2007	-192.13444263161054
2008	-181.12123881269443
2009	-136.9586737875252
2010	-147.91240013560082
2011	-152.2568638712022
2012	-149.09222145601214
2013	-180.95071617881447
2014	-177.98583612485515