Year	% of energy use
1971	-657.2483344382658
1972	-636.5051560480066
1973	-432.42018377659014
1974	-404.9967349377523
1975	-367.0683361812995
1976	-279.9333791984104
1977	-382.90090178633284
1978	-361.37995748447446
1979	-300.3014769690659
1980	-327.3510802768948
1981	-317.2048648089532
1982	-203.16278782803127
1983	-194.0703422481848
1984	-209.5786978682189
1985	-166.51331426460894
1986	-203.60660049683582
1987	-219.2294955680315
1988	-186.06537697916832
1989	-186.54025340794539
1990	-173.38894825783248
1991	-173.5584434738986
1992	-161.53026049756983
1993	-153.83666637153223
1994	-135.92732802753173
1995	-135.5258793734259
1996	-139.4878306424003
1997	-122.45519302263261
1998	-117.05282476819417
1999	-117.64515782678491
2000	-110.02159673247765
2001	-104.71851744738476
2002	-101.82898653728614
2003	-94.20088529305282
2004	-91.97521380822357
2005	-75.66550285423988
2006	-66.99892776942325
2007	-63.18549397809431
2008	-55.765304981993204
2009	-60.71546358618777
2010	-59.52570296454398
2011	-63.21797684630286
2012	-58.33063562087404
2013	-60.881300739434664
2014	-61.58425476977827