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	2.8889814343951112
1972	2.894308080842627
1973	2.866442633688445
1974	2.824838461940182
1975	2.757350160794099
1976	2.727107355082391
1977	2.7091512769862374
1978	2.6819727875415094
1979	2.671512416298027
1980	2.5182363732070656
1981	2.671265691124816
1982	2.798513450984297
1983	2.746303220686556
1984	2.712048521306009
1985	2.8086783964797073
1986	2.8413942884748473
1987	2.8474981494156926
1988	2.7097034971964216
1989	2.8518406266360783
1990	2.5743844749613993
1991	2.5549129489648297
1992	2.600289629175592
1993	2.5348949964033993
1994	2.537142928703403
1995	2.5162067837702526
1996	2.4793431491403712
1997	2.440352415705691
1998	2.46798822101496
1999	2.4403867005402966
2000	2.456524990230226
2001	2.4364886950426774
2002	2.4372664168719322
2003	2.424290763601243
2004	2.4105854193213503
2005	2.4028355483302284
2006	2.4328317712327117
2007	2.4403005148648074
2008	2.456366724881242
2009	2.4344109231141915
2010	2.4047432980125683
2011	2.4247448020329028
2012	2.385171304974536
2013	2.3842741009344413
2014	2.359551912675379
2015	2.711203036565908