Year	% of energy use
1971	-110.43824237905164
1972	-128.91370821228492
1973	-141.81254797013227
1974	-150.48432737065406
1975	-111.14439995292408
1976	-124.84736194531366
1977	-119.21373600247689
1978	-102.51659531076574
1979	-122.64254663049886
1980	-104.84077207080522
1981	-67.96834021750607
1982	-57.214012166487215
1983	-53.01518530192939
1984	-63.181655696440615
1985	-64.96489492846993
1986	-61.92893695221282
1987	-52.777214644259665
1988	-55.89840064242528
1989	-63.637786650056796
1990	-41.1670943838276
1991	-41.18044168483507
1992	-43.26919526193556
1993	-42.70809080305293
1994	-45.202646477539645
1995	-47.71546695331
1996	-49.660031853149285
1997	-53.65876875118209
1998	-49.22054818243216
1999	-44.630899254762596
2000	-49.016377773589596
2001	-50.110643627302274
2002	-40.81532865289911
2003	-48.14804901036096
2004	-51.313436466229724
2005	-51.393594648065864
2006	-49.65818865384669
2007	-46.67536834654296
2008	-43.92356526729332
2009	-43.156596886664374
2010	-48.695583347793956
2011	-44.87278383313961
2012	-42.55347095983091
2013	-38.95621531184476
2014	-44.40937425330789