Year	kg per kg of oil equivalent energy use
1960	2.8016270920918243
1961	2.7734786697378877
1962	2.7846700408307736
1963	2.80946916601887
1964	2.9136657770032213
1965	3.0671845723453264
1966	2.9121618033996217
1967	2.9667464291575762
1968	2.9786086657499458
1969	3.0584639797437085
1970	2.904675275927791
1971	2.9599532605983203
1972	2.9618390077137344
1973	2.9969216706920427
1974	2.9248244066821
1975	2.9130865840862556
1976	2.8183451804384716
1977	2.832657217379733
1978	3.0390967862558558
1979	3.0165531344619105
1980	3.1714982579939055
1981	3.287234186011517
1982	3.2018609965533846
1983	3.213965804100049
1984	3.2721230143720144
1985	3.3257777049408244
1986	3.2399261528760275
1987	3.29960926522671
1988	3.3588560076630856
1989	3.3032438199831926
1990	3.051803743363774
1991	3.1079544107668435
1992	3.093078246200661
1993	2.9948913329256723
1994	3.066412574142383
1995	3.117848547494248
1996	3.0334586161833434
1997	3.0289122644564554
1998	3.1531719229315742
1999	3.136519674672916
2000	3.1342050680561258
2001	3.2622770813185453
2002	3.2241753526727877
2003	3.1770113305010077
2004	3.241802792741173
2005	3.256213107255743
2006	3.173863195122984
2007	3.1529920910682496
2008	3.065224763898005
2009	3.105716611847892
2010	3.03488569571364
2011	3.005641860206917
2012	3.043656097426156
2013	2.998806209934889
2014	2.953480085552867
2015	2.8787341232801715