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	2.288118463400099
1972	2.279873586229373
1973	2.346357161841564
1974	2.323527110906576
1975	2.2747548110374742
1976	2.3489432678470856
1977	2.3883009357767513
1978	2.394992478279957
1979	2.3839888533997895
1980	2.3569269647644204
1981	2.2922338385495147
1982	2.262392863423156
1983	2.289588057302955
1984	2.2889253141263013
1985	2.3315848311397294
1986	2.370234837136029
1987	2.347256504623091
1988	2.371026824787429
1989	2.3978010843089335
1990	2.0941124085348433
1991	2.1140742994626076
1992	2.114674289331267
1993	2.1159645329548478
1994	2.130247527845389
1995	2.145135268380469
1996	2.189299630097423
1997	2.20305402789455
1998	2.2132633655323253
1999	2.1963244155965196
2000	2.228867875815323
2001	2.233189926735006
2002	2.2403394942062747
2003	2.2673049325982593
2004	2.27478146844499
2005	2.281339919399906
2006	2.2923865141758504
2007	2.356424735074177
2008	2.354787835006804
2009	2.34076181692107
2010	2.361991398258444
2011	2.414334803933905
2012	2.4200955171064837
2013	2.425590013688527
2014	2.4292882047442164
2015	2.616377404082895