Year	kg per 2010 US$ of GDP
1960	0.906114348735166
1961	0.736328753890053
1962	0.63132978891046
1963	0.612118016591193
1964	0.583584674429239
1965	0.593815210125751
1966	0.590810798176211
1967	0.549199219063302
1968	0.551615501050239
1969	0.577287422173809
1970	0.685990935908683
1971	0.703903693909011
1972	0.697315141768934
1973	0.689840514720662
1974	0.691878597685446
1975	0.706494560625831
1976	0.71277457182222
1977	0.729150074520736
1978	0.732728049823127
1979	0.719823065449653
1980	0.692898040953335
1981	0.655871842625334
1982	0.65478891265199
1983	0.648127632223024
1984	0.655382072399138
1985	0.650216017743031
1986	0.643369634990912
1987	0.635780150379799
1988	0.639127347376173
1989	0.627053281200208
1990	0.615587488113432
1991	0.615583167646372
1992	0.624805003803602
1993	0.639887311511207
1994	0.648363793827093
1995	0.655821094270481
1996	0.653732051305093
1997	0.642749327234153
1998	0.609948954123066
1999	0.604588647018532
2000	0.597787414767123
2001	0.594175098193831
2002	0.612292590331077
2003	0.650488626006557
2004	0.682468816892148
2005	0.698725915736437
2006	0.708332813653078
2007	0.705587410210419
2008	0.719393821648115
2009	0.735302936365816
2010	0.743116136955937
2011	0.77632607420006
2012	0.760763731906889
2013	0.733916202703218
2014	0.705521495042159