Year	% of energy use
1971	-109.71259457263834
1972	-40.299241293782515
1973	-22.82865149808155
1974	1.5391533413418872
1975	-35.34355887177098
1976	-61.050516375746476
1977	-85.60942665611323
1978	-115.78827963766425
1979	-105.43715322299916
1980	-121.78655860759828
1981	-105.55401741735895
1982	-95.08735651624008
1983	-90.92254555085236
1984	-98.13750973409145
1985	-99.59727485721073
1986	-81.65350136990625
1987	-89.73640122244909
1988	-79.77342609168878
1989	-74.79272808065085
1990	-70.13186206065139
1991	-72.09106608669552
1992	-70.81246974483328
1993	-74.1072530090249
1994	-79.21939565011334
1995	-70.2556051733422
1996	-57.345242699156444
1997	-48.55960849915774
1998	-37.47344986328615
1999	-39.452631057298646
2000	-30.80412875272674
2001	-25.0947717282144
2002	-25.494767495549393
2003	-27.14792000991401
2004	-18.11120304796281
2005	-26.84728603289484
2006	-24.6558180926659
2007	-22.66251772252498
2008	-23.329666761758723
2009	-18.9783834675554
2010	-16.46163879149664
2011	-9.871070497052052
2012	-4.970103110131872
2013	-6.891690486328981
2014	-7.3914939758021605