Year	kg per 2010 US$ of GDP
1960	0.242093935996012
1961	0.236236520873792
1962	0.23641404089704
1963	0.232147708265629
1964	0.247816191771715
1965	0.264759184066425
1966	0.273060162709201
1967	0.286220761940882
1968	0.354926134205433
1969	0.338039115475369
1970	0.334281097314241
1971	0.347563962306543
1972	0.34585849250787
1973	0.363493606428537
1974	0.35378967209937
1975	0.358562971712695
1976	0.35115865338885
1977	0.359366976935649
1978	0.361944314266079
1979	0.404251040448661
1980	0.414355499099814
1981	0.420120563619531
1982	0.417381789893034
1983	0.432140933903454
1984	0.454798264535397
1985	0.457140195191324
1986	0.443941509051444
1987	0.468107806202384
1988	0.484826796265951
1989	0.458052531085953
1990	0.454269760756201
1991	0.461965257256052
1992	0.470093354479799
1993	0.455509994431481
1994	0.452269031363683
1995	0.447232852404101
1996	0.448543685586262
1997	0.43981567519485
1998	0.44357566330678
1999	0.443155830075734
2000	0.436329145350953
2001	0.433884165357092
2002	0.40886567077227
2003	0.438843996057512
2004	0.437034166263015
2005	0.416459610155699
2006	0.415134448834523
2007	0.425355591476666
2008	0.416488611124035
2009	0.402789173937099
2010	0.408477669999542
2011	0.405658876292099
2012	0.384045216478856
2013	0.382230043022996
2014	0.383639268953148