Year	kg per 2010 US$ of GDP
1960	0.531442617711079
1961	0.572902574321997
1962	0.659156267931074
1963	0.737299872125919
1964	0.709163810610026
1965	0.744625323199475
1966	0.798144898389494
1967	0.856659444564459
1968	0.801846098837891
1969	0.799307998446413
1970	0.919105048059558
1971	0.906885224238652
1972	0.871196467828937
1973	0.919117774109517
1974	0.869459348717007
1975	0.871489029448445
1976	0.878509938101171
1977	0.886472728323324
1978	0.858489233486269
1979	0.928342680337296
1980	0.9561605524924
1981	0.924338919485096
1982	0.866992693839023
1983	0.814160615989341
1984	0.800717103009917
1985	0.808514058923401
1986	0.7437094999289
1987	0.69826819779633
1988	0.718878607316179
1989	0.713685278849836
1990	0.680498179492027
1991	0.652957980807001
1992	0.668597739368896
1993	0.708675005134315
1994	0.693451041677866
1995	0.689416169835646
1996	0.690352437543296
1997	0.694128549539889
1998	0.622972704625405
1999	0.613420368276058
2000	0.630336535250723
2001	0.606594412655753
2002	0.583991029607059
2003	0.568059855524091
2004	0.560181925454034
2005	0.517399942211203
2006	0.500154976384048
2007	0.49945583488769
2008	0.497388544823367
2009	0.495132310494994
2010	0.517786073467816
2011	0.519389291858394
2012	0.503068007941378
2013	0.496052315394865
2014	0.475684451729237