Year	kg per kg of oil equivalent energy use
1960	1.9193221150381135
1961	1.9088609495161206
1962	1.8852452935200579
1963	1.871978410862035
1964	1.8889237613487007
1965	1.7355070658946592
1966	1.9234617670158045
1967	1.813871065732327
1968	1.8144059347008847
1969	1.8083959724448944
1970	2.114752217200282
1971	2.040950649813364
1972	2.1356895607258695
1973	2.136003547583957
1974	1.9409672147380592
1975	2.027779410265319
1976	1.8378040704709817
1977	1.8927138187611698
1978	1.9659314230152636
1979	1.8822057523882352
1980	2.0734520746122067
1981	2.2281537877519253
1982	2.340638208902599
1983	2.0513712317644757
1984	2.0915978256239223
1985	2.036176085740171
1986	2.2484936789729852
1987	1.9258284779620303
1988	2.0950142962050196
1989	2.343862589349997
1990	1.386057636738502
1991	1.2529529540985789
1992	1.3768111453246545
1993	1.3605559495820356
1994	1.4607273875756177
1995	1.4083808275373426
1996	1.4939506843588453
1997	1.4847175259605825
1998	1.4897624382659593
1999	1.4921560423034008
2000	1.3025171334701307
2001	1.2941365493407977
2002	1.380735957500731
2003	1.3705372158821338
2004	1.4139995543598842
2005	1.3556910658505037
2006	1.3740681272981436
2007	1.3765084631000462
2008	1.1513013027873356
2009	1.1961022588542867
2010	1.2346276543204195
2011	1.4351339809780423
2012	1.3194828679774901
2013	1.1724162520150618
2014	1.331655382615065
2015	1.2800877774475965