Year	kg per 2010 US$ of GDP
1960	0.278460693278405
1961	0.233470354683227
1962	0.308623594998561
1963	0.303989930182311
1964	0.509438582038627
1965	0.424277546331041
1966	0.397196000820549
1967	0.386247249430722
1968	0.398502169268844
1969	0.424381823984389
1970	0.453136190002697
1971	0.447815069048708
1972	0.438849444316624
1973	0.428028456321661
1974	0.443856983694511
1975	0.410151490622368
1976	0.309988770382541
1977	0.463453220099321
1978	0.422321482633411
1979	0.444209671024425
1980	0.427791765070833
1981	0.546939043842418
1982	0.451570075095435
1983	0.400380288359782
1984	0.301185365962956
1985	0.313766664590396
1986	0.304100231302231
1987	0.256566014808858
1988	0.295190001306291
1989	0.312962765601315
1990	0.381796127938734
1991	0.323457188402754
1992	0.339844695266601
1993	0.334388029848086
1994	0.316609769955779
1995	0.314944204162017
1996	0.323636143510932
1997	0.319097865282811
1998	0.306252744010643
1999	0.286843874323989
2000	0.313621709789957
2001	0.385008750597846
2002	0.314778228389769
2003	0.366811615063086
2004	0.449443433624053
2005	0.361651599083962
2006	0.394262674680519
2007	0.378481631226264
2008	0.289257871621928
2009	0.259663377110582
2010	0.388825844405306
2011	0.337656526197246
2012	0.323988901289459
2013	0.336103731387375
2014	0.323337441176579