Year	kg per 2010 US$ of GDP
1960	0.882432052565317
1961	0.86009926034781
1962	0.841238606477439
1963	0.839370090373718
1964	0.831666811196818
1965	0.815097206414803
1966	0.802605088322738
1967	0.814602275155505
1968	0.807894566236672
1969	0.819499554429607
1970	0.883030568421796
1971	0.861448692120237
1972	0.859354338528934
1973	0.846344722975435
1974	0.820755728318582
1975	0.79055025440194
1976	0.782360598327437
1977	0.769300215978016
1978	0.752481966092904
1979	0.734091155944056
1980	0.70971794976764
1981	0.664616349949133
1982	0.644526084476495
1983	0.621333120644279
1984	0.598516737811363
1985	0.575871686026112
1986	0.555728710945932
1987	0.560844336327777
1988	0.56229690951122
1989	0.550219453967275
1990	0.524999555974113
1991	0.525535367981855
1992	0.518909147212587
1993	0.516737240744043
1994	0.503493160847707
1995	0.494683799015263
1996	0.488836079789977
1997	0.478911768443849
1998	0.462019445267392
1999	0.449290195221239
2000	0.445952428868908
2001	0.433812374376158
2002	0.428444347222841
2003	0.421559059903301
2004	0.411588898971454
2005	0.400187608528681
2006	0.382659430357214
2007	0.381699908225339
2008	0.371669308992652
2009	0.358328398960474
2010	0.357033897660885
2011	0.344920678008038
2012	0.326501803740692
2013	0.322689877265744
2014	0.321233770711175