Year	kg per 2010 US$ of GDP
1960	0.572399736403231
1961	0.561910947482855
1962	0.565884723983766
1963	0.574869516901369
1964	0.567391032582835
1965	0.561893637454328
1966	0.554844890007438
1967	0.543192838329611
1968	0.546966648781723
1969	0.548735521353855
1970	0.55436412687203
1971	0.548221209207072
1972	0.54434577035496
1973	0.539224916850125
1974	0.519820690608074
1975	0.514058850868812
1976	0.523620127900586
1977	0.507450486418289
1978	0.507732758298134
1979	0.509858216316847
1980	0.488490050967286
1981	0.459737781869052
1982	0.445222629595567
1983	0.430933397476045
1984	0.417794154638366
1985	0.417617964286931
1986	0.405808819021266
1987	0.401735499307354
1988	0.379726965958443
1989	0.376578865099253
1990	0.346865545351924
1991	0.343048973229341
1992	0.329740806935387
1993	0.325627445139637
1994	0.312288847874984
1995	0.309069760650447
1996	0.311362107404413
1997	0.295544063226357
1998	0.287285840355524
1999	0.273770366202111
2000	0.26471671898632
2001	0.264554634547214
2002	0.259434546722422
2003	0.26085791521476
2004	0.254847316804421
2005	0.248542138519372
2006	0.242355763605996
2007	0.231062898926696
2008	0.22477386950397
2009	0.216151673909663
2010	0.2180987398211
2011	0.206239558489892
2012	0.202769356109461
2013	0.198042456009673
2014	0.184366801513666