Year	kg per kg of oil equivalent energy use
1960	1.5735021773423372
1961	1.6003260700157431
1962	1.824880771646109
1963	1.8209319758097944
1964	2.0068482978430437
1965	1.9831323687322107
1966	2.079713766441332
1967	2.1328516286322694
1968	2.1974667800346968
1969	2.227591524560191
1970	2.341257631278414
1971	2.1173433559484702
1972	2.124821765626696
1973	2.16053320770071
1974	2.148020040987573
1975	2.180474095003833
1976	2.2232998673616717
1977	2.2323021907947513
1978	2.2772064583388256
1979	2.283995300163534
1980	2.2343333294146497
1981	2.200773942977095
1982	2.254737879948233
1983	2.288427150610617
1984	2.302055835378642
1985	2.3682590783368274
1986	2.38723521824892
1987	2.410581919001488
1988	2.451475394034211
1989	2.455111658582608
1990	2.2992109888863768
1991	2.341045930634327
1992	2.3668307069374617
1993	2.365567312023102
1994	2.371702465990236
1995	2.4065525715040628
1996	2.385311217256146
1997	2.394639455214211
1998	2.4224336519132175
1999	2.368536254406705
2000	2.4066103804591354
2001	2.422818915403583
2002	2.4413338539425764
2003	2.471663906750542
2004	2.5074320498030147
2005	2.550563896880459
2006	2.589472962555956
2007	2.6233946245137925
2008	2.625407954527167
2009	2.6305734752026337
2010	2.643620178002282
2011	2.700342437165759
2012	2.687323492371247
2013	2.7028303861034173
2014	2.6849691460845433
2015	2.599867802882943