Year	kg per 2010 US$ of GDP
1961	0.314992647710774
1962	0.301068462005125
1963	0.299924330521859
1964	0.274435089932858
1965	0.272424091865565
1966	0.287626263070953
1967	0.331908326465006
1968	0.328774996807418
1969	0.369273999741189
1970	0.36610779067219
1971	0.372053813132316
1972	0.340938327022574
1973	0.304010808069582
1974	0.340986898540633
1975	0.350153592172792
1976	0.342154946460549
1977	0.348442719520146
1978	0.356271508382988
1979	0.32204014955037
1980	0.306789057223353
1981	0.314957394363448
1982	0.322499239044814
1983	0.324586416424305
1984	0.313843605864768
1985	0.320788073941475
1986	0.322542416655349
1987	0.312924586655388
1988	0.300722060206151
1989	0.302657942191035
1990	0.26254008705774
1991	0.260239990698564
1992	0.283075632320983
1993	0.281609209936853
1994	0.237614336927389
1995	0.233492337113364
1996	0.207253912302236
1997	0.20789907362169
1998	0.281307328799026
1999	0.299804627482771
2000	0.263619788149055
2001	0.246056408495543
2002	0.252756478959973
2003	0.268291387101656
2004	0.23742456527694
2005	0.232558575105958
2006	0.20828859309157
2007	0.20338525208122
2008	0.200316789149167
2009	0.196822204862156
2010	0.177914803339241
2011	0.182748744872823
2012	0.178173819411037
2013	0.179103682428896
2014	0.179003868123689