Year	kg per 2010 US$ of GDP
1960	0.34973267313583
1961	0.343735742717144
1962	0.350564146595031
1963	0.327365068906281
1964	0.337969630970173
1965	0.438309722466661
1966	0.460778445124272
1967	0.445569556578404
1968	0.39088914110353
1969	0.369330305349455
1970	0.400993788658688
1971	0.354220253692193
1972	0.329184693221835
1973	0.355511947543867
1974	0.336234743343665
1975	0.329051453022941
1976	0.327381506168272
1977	0.328692166853041
1978	0.33148389385682
1979	0.309784830628818
1980	0.306555566868948
1981	0.29192386886868
1982	0.32462499939584
1983	0.312209681228951
1984	0.306811681968032
1985	0.308888921914748
1986	0.317405423641018
1987	0.304699501723735
1988	0.324906758971033
1989	0.34138051719293
1990	0.363585917409573
1991	0.341771886817229
1992	0.369247548367681
1993	0.373581965195032
1994	0.373411350329006
1995	0.369814843213046
1996	0.365190860434744
1997	0.369792615450954
1998	0.364467733515446
1999	0.344553625416338
2000	0.346082029331621
2001	0.365029741799175
2002	0.343265414112141
2003	0.357575285044955
2004	0.321916278619815
2005	0.298837861636958
2006	0.310405095022878
2007	0.296307999883655
2008	0.311737075790129
2009	0.291016871475297
2010	0.294699292408195
2011	0.281767348706505
2012	0.301468948202279
2013	0.257048852374782
2014	0.238301713747921