Year	kg per 2010 US$ of GDP
1960	0.411488293027832
1961	0.410505891097819
1962	0.409476960137448
1963	0.374941628161866
1964	0.376813713061122
1965	0.424618962481426
1966	0.427823430149477
1967	0.403706337126731
1968	0.449101165609968
1969	0.420906408369719
1970	0.422331749071452
1971	0.455158976836415
1972	0.468314716445157
1973	0.514284201778731
1974	0.467921812946731
1975	0.557591198006711
1976	0.540776097955239
1977	0.512658024495016
1978	0.383340075812171
1979	0.412214331014465
1980	0.356567301357401
1981	0.34911666257885
1982	0.3266633113954
1983	0.362972968282193
1984	0.291469706907838
1985	0.253360979957488
1986	0.256233441590542
1987	0.303346283810453
1988	0.320517872893151
1989	0.271745030042427
1990	0.275866188870711
1991	0.295530310927477
1992	0.357382526013082
1993	0.314603085132649
1994	0.336615679594905
1995	0.227631530629122
1996	0.338810651532505
1997	0.388662094950672
1998	0.38135957382406
1999	0.349788743496572
2000	0.347810763195042
2001	0.418537786689633
2002	0.342997196934742
2003	0.34498528461393
2004	0.302685678693501
2005	0.332682793772755
2006	0.329995467696488
2007	0.287790396661735
2008	0.268377220984213
2009	0.309108861369406
2010	0.311268329466751
2011	0.30816539748945
2012	0.281122306687623
2013	0.278701214329682
2014	0.217799067905183