Year	% of energy use
1960	39.24915659301249
1961	41.61614581978808
1962	45.33629373873501
1963	51.15683547016896
1964	53.94461203725526
1965	55.70481822776014
1966	58.01114901234432
1967	64.44546441712384
1968	66.35089154183143
1969	69.85478390142062
1970	71.25263913801389
1971	26.608337108322416
1972	25.995143109638242
1973	26.964131780926152
1974	26.369913346297107
1975	23.15810526333198
1976	23.08138861462838
1977	21.85824870576622
1978	21.18385551996454
1979	21.377932201515797
1980	20.962540587978058
1981	19.54886670570325
1982	19.119949236594437
1983	16.973350539228974
1984	15.006104840318846
1985	13.389991363392427
1986	13.120725795797709
1987	13.590016220902884
1988	16.788011938311403
1989	15.595820954004127
1990	18.20194419521013
1991	16.112361838923906
1992	17.556787216066226
1993	19.186027888158492
1994	19.29616713904648
1995	18.39725387114931
1996	18.86332850069509
1997	19.44932246730557
1998	17.702909566532597
1999	19.60583329578776
2000	18.82936688003117
2001	17.348946272048227
2002	18.250715986033025
2003	18.48970133403519
2004	18.506628999189306
2005	16.99722236011139
2006	16.722095960468764
2007	16.859179340637247
2008	16.39957619031166
2009	15.933117277439285
2010	16.242936581540587
2011	15.932796883537675
2012	17.52554222055678
2013	17.158938266755623
2014	17.363318884523423
2015	44.721697726192566