Year	kg per kg of oil equivalent energy use
1960	2.879629038134471
1961	3.0968505147980303
1962	3.0482983615635573
1963	2.9558869389154445
1964	2.914009713448729
1965	2.8737824660885987
1966	2.847848233233313
1967	2.8267464289135846
1968	2.8716621705669274
1969	2.8895395256532077
1970	2.997159672730184
1971	2.9811525438984594
1972	2.985122952531555
1973	2.85842225953063
1974	2.8430851109072335
1975	2.852189453396884
1976	2.80162577915388
1977	2.8323336981536253
1978	2.7142641883350658
1979	2.7093313793596345
1980	2.750388054249173
1981	2.7585806920293416
1982	2.6754487552188926
1983	2.624436363631181
1984	2.5956686388104853
1985	2.5224874488460864
1986	2.4942767133973063
1987	2.437003269031075
1988	2.4876637397269032
1989	2.4860126955061754
1990	2.490449780664627
1991	2.495575700181753
1992	2.4644876378014455
1993	2.431488341544111
1994	2.4166487569831814
1995	2.3753803532244198
1996	2.3531923154657366
1997	2.3045734828966102
1998	2.2625392233799766
1999	2.295305732709601
2000	2.2836631700085697
2001	2.2969219385912854
2002	2.3723872529380547
2003	2.4079962206790664
2004	2.3243871875119817
2005	2.338140553032825
2006	2.296446128933687
2007	2.3876621469977337
2008	2.3468260009103004
2009	2.3379147121723944
2010	2.3186026827256683
2011	2.6261265651187444
2012	2.773649757608324
2013	2.773180351781656
2014	2.7613678020756454
2015	2.7104206760313128