Year	% of energy use
1971	-2534.276616301074
1972	-2469.796085301486
1973	-2147.661248522723
1974	-1894.2080820382253
1975	-1625.872259594601
1976	-1529.6738281324997
1977	-1291.8808428753466
1978	-1296.2817632555993
1979	-1228.00776759208
1980	-795.3883437564092
1981	-518.3960069670853
1982	-304.876299161046
1983	-390.75700913244634
1984	-429.99712068885054
1985	-333.3144344085046
1986	-328.4817543230547
1987	-321.4049262372639
1988	-311.06095791648926
1989	-319.8831078652201
1990	-452.990449872755
1991	-273.30582307488254
1992	-577.1623412361638
1993	-766.214366669431
1994	-689.355613994088
1995	-676.7085682129284
1996	-691.9602892379902
1997	-683.5087943510582
1998	-599.3835383162591
1999	-497.55158937487136
2000	-510.29685109616827
2001	-460.2480523790284
2002	-390.39897551374855
2003	-452.0119017009689
2004	-462.60480248567274
2005	-458.38398520034286
2006	-487.86899373455446
2007	-458.87331901630154
2008	-433.0403212971131
2009	-315.26536014623787
2010	-319.47316868179
2011	-376.2103498006566
2012	-365.44569039274194
2013	-387.6093086572365
2014	-391.05848581964045