Year	kg per kg of oil equivalent energy use
1990	2.194616141745696
1991	2.1710744395643395
1992	2.3731124253495555
1993	2.4201377554853942
1994	2.4174647191079446
1995	2.3246640430114165
1996	2.3011206866972245
1997	2.329461889964031
1998	2.3047044845731586
1999	2.2737639975235906
2000	2.156352702961052
2001	2.0965995902027124
2002	2.0577766607583263
2003	2.0289933301139715
2004	2.08215519078825
2005	2.110797747007436
2006	2.064796190466828
2007	2.0557049809928833
2008	2.1573512666125354
2009	2.156441539699259
2010	2.2333973232367934
2011	1.9884384995226045
2012	1.9604014642516907
2013	2.197142285218618
2014	2.143349074653097