Year	kg per 2010 US$ of GDP
1960	1.22360891030258
1961	1.00255044934622
1962	0.896882104653495
1963	0.873278383293091
1964	0.848218112643989
1965	0.855498259848811
1966	0.881191671705978
1967	0.82500557612243
1968	0.83859793903431
1969	0.879616968249238
1970	0.95111392236593
1971	0.975865986045386
1972	0.956078206797525
1973	0.945766133525842
1974	0.918370553993201
1975	0.957148872651872
1976	0.950655038863716
1977	0.977554659088444
1978	1.0386063873247
1979	1.02537386206497
1980	0.990929729548711
1981	0.973042994387178
1982	1.00924236561185
1983	1.03867621451735
1984	1.04477162553139
1985	1.05993773094684
1986	1.06140184189122
1987	1.07048215645004
1988	1.09527476109382
1989	1.10706193560051
1990	1.07174484504165
1991	1.09532626714478
1992	1.12392717325434
1993	1.10378976400332
1994	1.07770255990984
1995	1.08260999708531
1996	1.05930960452842
1997	1.0038724961248
1998	0.970155995460095
1999	0.953004361557816
2000	0.91599185904888
2001	0.907388383779436
2002	0.912341234864232
2003	0.958917105540595
2004	0.967353886227835
2005	0.971383946456154
2006	0.963488654602008
2007	0.927416061498681
2008	0.929453342421079
2009	0.933558446027566
2010	0.934287299487465
2011	0.947890644919551
2012	0.930239832525963
2013	0.89966409778042
2014	0.870095613534424