Year	kg per 2010 US$ of GDP
1960	1.06773840155185
1961	0.909730068710165
1962	0.837251009535462
1963	0.824134785876923
1964	0.8044309198387
1965	0.826215898130877
1966	0.85503238540112
1967	0.811796122548395
1968	0.83404622708364
1969	0.859954154989455
1970	0.913095549779988
1971	0.936728864079448
1972	0.928471358574014
1973	0.925858666853708
1974	0.90387056823399
1975	0.934312649296537
1976	0.92953783654901
1977	0.951668457345321
1978	0.999492040497989
1979	1.00255287951979
1980	0.970899448433365
1981	0.960884860058636
1982	0.991817681133954
1983	1.01729428652215
1984	1.02424556395903
1985	1.0426962741136
1986	1.04620675071552
1987	1.05507321261825
1988	1.07467279805723
1989	1.0760247628205
1990	1.05259964622815
1991	1.08324347625767
1992	1.11474852784369
1993	1.09225057936394
1994	1.05864905761028
1995	1.06002221308327
1996	1.03974954801013
1997	0.990674596281008
1998	0.960987799557586
1999	0.949069188744372
2000	0.922487767196805
2001	0.911135771527107
2002	0.909190528969593
2003	0.943962406314059
2004	0.945783798503587
2005	0.942703347447354
2006	0.931197130664194
2007	0.901254682517399
2008	0.907673559936962
2009	0.908275333306021
2010	0.899910673493939
2011	0.916917971877606
2012	0.904481424294439
2013	0.864959706855335
2014	0.838991497349097