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	4.776018849939093
1972	5.427765155494296
1973	5.00981558500612
1974	4.332022566912502
1975	4.005376598584281
1976	3.847614152288438
1977	3.8932402535053114
1978	4.408464870133508
1979	3.8441192703797533
1980	3.4464822068377403
1981	2.6118032259545267
1982	2.493357669065123
1983	2.2434173440509584
1984	2.2267494401309262
1985	2.273839654734798
1986	2.202168452569435
1987	2.1716987771216343
1988	2.269394201227256
1989	2.439516555908915
1990	2.58947412703572
1991	2.4933667216406024
1992	2.4503551679695064
1993	2.375967460026169
1994	2.3722154557848545
1995	2.3298767129640994
1996	2.326224987872499
1997	2.2281744750425214
1998	2.232711292597065
1999	2.2312114120027795
2000	2.1862441389793466
2001	2.1697653237366095
2002	2.1706314276634693
2003	2.183220643654584
2004	2.2945080786508623
2005	2.455555181463567
2006	2.328553352682691
2007	2.275122378642879
2008	2.1570229902133917
2009	2.109361170542277
2010	2.081034252903785
2011	2.0374062613826363
2012	1.9791941404886126
2013	1.9311609279371735
2014	1.9159964959075895
2015	1.5463227460349864