Year	% of energy use
1971	34.2238260048769
1972	-27.55539861180725
1973	-358.01897243888976
1974	-426.4688821819026
1975	-300.95616261997236
1976	-314.25505961272773
1977	-289.9365537055446
1978	-380.233564158324
1979	-439.95426462328487
1980	-516.1247486987193
1981	-619.5371696444644
1982	-658.0971907931348
1983	-673.4679139910207
1984	-790.5728619128806
1985	-739.023752189285
1986	-770.9836769473939
1987	-807.5665996539054
1988	-933.4503445828988
1989	-1021.6661769141449
1990	-1010.9236887597821
1991	-968.4484172264541
1992	-1056.1699030740226
1993	-1162.6535262701866
1994	-1291.6208212304693
1995	-1149.1164053188434
1996	-1377.285478580501
1997	-1617.77435356026
1998	-1780.827586396836
1999	-1942.0030382551572
2000	-1938.6618996100708
2001	-1596.4080246711892
2002	-1528.3984979290385
2003	-1169.7517395358277
2004	-1145.3850656759037
2005	-1154.6069956992296
2006	-1000.956955675505
2007	-897.7555387294377
2008	-889.660901542921
2009	-901.1432454008731
2010	-944.8928184228511
2011	-672.1126882941745
2012	-539.7259224724893
2013	-464.55872061950043
2014	-496.5979012317964