Year	kg per 2010 US$ of GDP
1960	0.357872164496488
1961	0.339953887957145
1962	0.339504486445135
1963	0.338115017725967
1964	0.338481416684818
1965	0.330496464296126
1966	0.336957446660301
1967	0.347060466200431
1968	0.342126034968053
1969	0.348778759092588
1970	0.357321713984988
1971	0.350512256702656
1972	0.342616707014853
1973	0.344103600577986
1974	0.344138879452515
1975	0.337261772622194
1976	0.331020707928632
1977	0.330784886995634
1978	0.348098399177483
1979	0.349580729512618
1980	0.347356486500396
1981	0.34551979418298
1982	0.357137005226977
1983	0.35151201456078
1984	0.340350797430082
1985	0.337502399195042
1986	0.337186021699531
1987	0.343208367155424
1988	0.347525245673657
1989	0.36308416485183
1990	0.34679181913004
1991	0.342413335532072
1992	0.340599156029733
1993	0.341249784576956
1994	0.33822866491042
1995	0.336924748598732
1996	0.338724120160069
1997	0.33974082766468
1998	0.35458115026727
1999	0.359234357387711
2000	0.344537995017523
2001	0.351452349137973
2002	0.354640361404363
2003	0.357677147558852
2004	0.337349736196061
2005	0.340043663371254
2006	0.33119960576049
2007	0.317455828753148
2008	0.321733740426997
2009	0.321137628887789
2010	0.318943165810986
2011	0.310739720269658
2012	0.317285279383533
2013	0.313401786269147
2014	0.317883936042225