Year	kg per kg of oil equivalent energy use
1990	3.140337105119475
1991	3.121485712385828
1992	3.1656730725906317
1993	3.272457742997785
1994	3.2741681349763425
1995	3.2874792574850336
1996	3.1789308499582645
1997	3.2779613335641895
1998	3.2877383882875266
1999	3.2059438418952397
2000	3.204508077778853
2001	3.0851322086399335
2002	3.128187143496948
2003	3.1920242435143
2004	3.1806631597022856
2005	3.205573004731503
2006	3.152701224557009
2007	3.1684368253588713
2008	3.0507412231779103
2009	3.105752147254484
2010	2.988847805576539
2011	3.139129480657872
2012	3.1247894462556842
2013	3.095578172840182
2014	2.9203248348511806