Year	kg per 2010 US$ of GDP
1960	0.753532688207265
1961	0.731941906984554
1962	0.735601149831661
1963	0.759987743446799
1964	0.696319322384438
1965	0.683913947056359
1966	0.661514988600694
1967	0.650598323467032
1968	0.688815075126745
1969	0.673560402142243
1970	0.648222285603505
1971	0.603067726231471
1972	0.616599133761775
1973	0.615219475385004
1974	0.572885615060254
1975	0.527671954818547
1976	0.531793908169266
1977	0.51450275026248
1978	0.536984723781455
1979	0.541611396455524
1980	0.500327682303009
1981	0.459901187217934
1982	0.433335855087494
1983	0.373477482067138
1984	0.378086244649523
1985	0.368591691145018
1986	0.356453604439031
1987	0.349236502416
1988	0.324555194717352
1989	0.335886188570489
1990	0.321390118551836
1991	0.330217395272385
1992	0.328194947077644
1993	0.31860856298562
1994	0.322074464220059
1995	0.314552132371859
1996	0.325416992777695
1997	0.306552801198392
1998	0.308518710064902
1999	0.287549094678003
2000	0.27955069644434
2001	0.275878112838026
2002	0.253972431950791
2003	0.265179860669966
2004	0.251773933521409
2005	0.240854683686505
2006	0.231853443937197
2007	0.216739431154366
2008	0.216921147895189
2009	0.212189662960282
2010	0.229189381095473
2011	0.203037812123698
2012	0.192759282116277
2013	0.196141214960819
2014	0.186480679353145