Year	kg per 2010 US$ of GDP
1960	0.498837127239069
1961	0.514297572006907
1962	0.502835545677439
1963	0.495716583747749
1964	0.516470303016207
1965	0.546189766708983
1966	0.548925839268228
1967	0.574174702105673
1968	0.569652204318417
1969	0.567055108214763
1970	0.568224319754711
1971	0.608251077242086
1972	0.624566266448884
1973	0.635802741476042
1974	0.625256974257384
1975	0.607628658462231
1976	0.607044399948323
1977	0.597774601604645
1978	0.610020305243417
1979	0.660995653181562
1980	0.657547069196388
1981	0.705292197173763
1982	0.752752212881924
1983	0.78432325984601
1984	0.820165119620386
1985	0.826332384051362
1986	0.823503755803012
1987	0.789257399544126
1988	0.804070049301788
1989	0.746463824814369
1990	0.664484077335104
1991	0.683953539105392
1992	0.662316597457689
1993	0.700558966915999
1994	0.704696317162686
1995	0.73137753997127
1996	0.709764009095679
1997	0.714301218646939
1998	0.680596294578103
1999	0.6716870761681
2000	0.699340035972995
2001	0.681168882560684
2002	0.637924997380085
2003	0.67074475008688
2004	0.694939239035637
2005	0.627998995772713
2006	0.620984695404221
2007	0.603438952067986
2008	0.599683771025575
2009	0.573496931327388
2010	0.545077028746487
2011	0.529677371403645
2012	0.515855902006523
2013	0.501796201227576
2014	0.503073513202808