Year	kg per 2010 US$ of GDP
1960	0.277646258927361
1961	0.326132017745476
1962	0.293014698009392
1963	0.287329376636352
1964	0.276780401082315
1965	0.264148684356471
1966	0.269019930147497
1967	0.275769244773349
1968	0.361530209263442
1969	0.345196124674379
1970	0.393303972596338
1971	0.362229047445578
1972	0.395329993120952
1973	0.360365223222685
1974	0.376356277275338
1975	0.394516707198524
1976	0.380566660851573
1977	0.388128874206187
1978	0.374996926942722
1979	0.334750916649446
1980	0.35422468994968
1981	0.317696391303699
1982	0.313982819657672
1983	0.353213893784847
1984	0.329761275037544
1985	0.299524196318839
1986	0.275615620225183
1987	0.304098685595389
1988	0.344241372368266
1989	0.365028775873859
1990	0.337454578448269
1991	0.363357373016849
1992	0.390490484347033
1993	0.339576295674722
1994	0.39686100555182
1995	0.434512152377958
1996	0.435401979699216
1997	0.437075006825
1998	0.471784167025383
1999	0.484651247497092
2000	0.479314383714476
2001	0.529865072032748
2002	0.54445401941485
2003	0.578777366435671
2004	0.59292967014944
2005	0.573293925088929
2006	0.499053463430583
2007	0.588753841375371
2008	0.558009185311856
2009	0.519198211968593
2010	0.507050543742838
2011	0.548265596812347
2012	0.528251847397984
2013	0.51852052311707
2014	0.525726465992418