Year	kg per kg of oil equivalent energy use
1960	2.4367961099296758
1961	2.3690575368137443
1962	2.350988689081591
1963	2.363839127435876
1964	2.4096227394545293
1965	2.35575204994765
1966	2.5565781321994296
1967	2.4158552042903545
1968	2.454080171455255
1969	2.5217818575251023
1970	2.453577474645069
1971	2.347079650319622
1972	2.305625232313776
1973	2.249318565413717
1974	2.170608231291977
1975	2.0706745839620555
1976	2.084961981639881
1977	2.05715170664761
1978	1.9157082532808858
1979	1.9580884504263851
1980	1.772495328396463
1981	1.6371026318264632
1982	1.533930400150292
1983	1.4165127805497797
1984	1.318440461169454
1985	1.3210282338903654
1986	1.260824245101008
1987	1.2338972909471337
1988	1.1630269523319252
1989	1.1687640301073758
1990	1.1303400037306517
1991	1.1139216090811226
1992	1.2193271540053383
1993	1.2151053398063263
1994	1.1768280169170284
1995	1.1569028247124535
1996	1.2359300336609866
1997	1.143598867769358
1998	1.1428029623818285
1999	1.1420019048121173
2000	1.1203682613465884
2001	1.0389549118898949
2002	1.0431876400069529
2003	1.0905229251033202
2004	1.0190485250979253
2005	0.9736462976280242
2006	0.9739712652583852
2007	0.941677558017945
2008	0.9304197251401023
2009	0.9443579162310922
2010	0.9455096297886807
2011	0.8946408245815598
2012	0.8402740166461572
2013	0.8207061136817011
2014	0.811959536837514
2015	0.7839506895016304