Year	kg per 2010 US$ of GDP
1960	0.208818460141191
1961	0.185702137033991
1962	0.190037215403635
1963	0.21879349642654
1964	0.204955007522621
1965	0.208926637797093
1966	0.184430283802412
1967	0.185756906485665
1968	0.218188014549393
1969	0.197267515693194
1970	0.279233891130408
1971	0.23203160165104
1972	0.251254972412598
1973	0.249382900595721
1974	0.276955924060999
1975	0.295741785167184
1976	0.271773743267604
1977	0.327761260647208
1978	0.298830783768695
1979	0.274372300441795
1980	0.26291414218768
1981	0.324374001404023
1982	0.348083762493771
1983	0.438114278674174
1984	0.284737647910943
1985	0.349069131617051
1986	0.304013526731309
1987	0.312794962648403
1988	0.311000876872903
1989	0.286828626449108
1990	0.316852343378377
1991	0.310207651430664
1992	0.302240804616163
1993	0.329136858399155
1994	0.347144159292057
1995	0.355150778212349
1996	0.36099526438807
1997	0.393103814311393
1998	0.377618683196256
1999	0.369990184627253
2000	0.34260533086089
2001	0.362467065890099
2002	0.372041058729543
2003	0.363610740821061
2004	0.331587707631933
2005	0.297958254911412
2006	0.37475214575611
2007	0.377154277223983
2008	0.321298975744889
2009	0.258492779100992
2010	0.309432020347829
2011	0.267921703908157
2012	0.296162808795674
2013	0.339715524702282
2014	0.326671766491542