Year	kg per 2010 US$ of GDP
1960	0.556239242589711
1961	0.596752919528775
1962	0.595965762158209
1963	0.596078308516104
1964	0.562053856930313
1965	0.480949776725027
1966	0.455957304360046
1967	0.444143087108599
1968	0.429168281192023
1969	0.441468165284482
1970	0.455975627153479
1971	0.445998385385684
1972	0.400257444172097
1973	0.382623173542381
1974	0.464322862191183
1975	0.462648958401287
1976	0.419519152749858
1977	0.420484456090141
1978	0.414117742042708
1979	0.364141545810621
1980	0.424169351666995
1981	0.43051266631604
1982	0.304987570639427
1983	0.29892998311681
1984	0.272277988052059
1985	0.227810485307075
1986	0.234678124676753
1987	0.275394746142937
1988	0.240012730351865
1989	0.248569424735249
1990	0.267547172097503
1991	0.219240929911252
1992	0.252987044241062
1993	0.288801650488345
1994	0.290659154303651
1995	0.320743122944073
1996	0.380330492570495
1997	0.335382470639103
1998	0.394277568260911
1999	0.390602680539584
2000	0.397652146066868
2001	0.344595598790404
2002	0.291480856972191
2003	0.240042156354268
2004	0.257769719969471
2005	0.273363797256267
2006	0.287093630446465
2007	0.275890030187064
2008	0.286749392894545
2009	0.334714215331202
2010	0.304360327768444
2011	0.31707851500532
2012	0.282005861970801
2013	0.283750869906581
2014	0.288581417032653