Year	kg per kg of oil equivalent energy use
1960	2.242568970741477
1961	2.0927198736055925
1962	2.1711386125168617
1963	2.144064066431476
1964	2.094818316232806
1965	2.1093835634018228
1966	2.1018164449376955
1967	2.0224417434345443
1968	2.0174700821838805
1969	1.7506195799725184
1970	1.6063628377909798
1971	3.965825715676398
1972	4.176542823866692
1973	4.25040075246746
1974	3.9020035623263833
1975	3.840230166122409
1976	4.130374029807505
1977	4.0994488291513065
1978	4.285265263173307
1979	3.928420824223611
1980	3.687081669906947
1981	3.00134349756436
1982	2.8945087751148226
1983	2.644434178734117
1984	2.5463918769233165
1985	2.7013388940596825
1986	2.452980855891565
1987	2.4921831541560673
1988	2.4097676573755993
1989	2.592582421126143
1990	2.571660849082854
1991	2.4583587021429447
1992	2.3710168110617578
1993	2.348244687096395
1994	2.3553494524812244
1995	2.3311623052314263
1996	2.270137961593082
1997	2.2320578648640383
1998	2.1951547793733566
1999	2.138739495265133
2000	2.0828104542482215
2001	2.0489882099157843
2002	2.0418250464844667
2003	1.9986983483148628
2004	2.128804772533482
2005	2.235662540538748
2006	2.1504058154047767
2007	2.096267401849324
2008	1.9624428668447902
2009	1.902680205630384
2010	1.897678554810962
2011	1.8839767780240608
2012	1.8467899366871698
2013	1.8174547239418568
2014	1.806218584855193
2015	1.5463227460349864