Year	kg per 2010 US$ of GDP
1960	0.459253619689844
1961	0.468152484063901
1962	0.520038523124813
1963	0.509872445255991
1964	0.501990878770318
1965	0.504132947151751
1966	0.479400916101489
1967	0.47413594941318
1968	0.504406200360198
1969	0.515731116367092
1970	0.55381298355415
1971	0.556012511966388
1972	0.584473189317557
1973	0.603657061185923
1974	0.553410837918861
1975	0.563458874741696
1976	0.568341355651883
1977	0.493377339928382
1978	0.454900281516846
1979	0.454577283086538
1980	0.427786727195528
1981	0.390274769572591
1982	0.368235517958316
1983	0.391893924689923
1984	0.40102107434573
1985	0.373459915558971
1986	0.366669971089531
1987	0.351004126928595
1988	0.388332945771937
1989	0.424912672941271
1990	0.422984195456755
1991	0.368911607927066
1992	0.34405321263377
1993	0.344180683203572
1994	0.360594969148662
1995	0.36265741519152
1996	0.394500066238467
1997	0.427001709777404
1998	0.418350014287474
1999	0.448221966516492
2000	0.406954738588325
2001	0.3572722398929
2002	0.358345634700126
2003	0.347007944720699
2004	0.347964628519287
2005	0.34031098642831
2006	0.335603057722813
2007	0.35359376769982
2008	0.342553030571519
2009	0.323558271679391
2010	0.330610920624997
2011	0.341727185194068
2012	0.331556827250443
2013	0.327527416744975
2014	0.319274642133546