Year	kg per 2010 US$ of GDP
1960	0.22455603840313
1961	0.255896632581073
1962	0.297811948278164
1963	0.212262823816509
1964	0.208817762664316
1965	0.229531998235764
1966	0.308131980036666
1967	0.281887359565867
1968	0.273097680122821
1969	0.313420781802697
1970	0.384902928973835
1971	0.537574361890661
1972	0.640648766531221
1973	0.833997993803251
1974	0.646119843357028
1975	0.617490132590918
1976	0.696696239339782
1977	0.70786681922371
1978	0.967446701694871
1979	0.656731940614076
1980	0.950057894497019
1981	0.643941599476657
1982	0.511779462626526
1983	0.650692013781378
1984	0.832544042031906
1985	0.821843822293123
1986	0.857829861310113
1987	0.952710826085283
1988	0.960362568630039
1989	0.877133805596063
1990	0.836727249098159
1991	0.869766855216274
1992	0.866159120716246
1993	0.907612132532205
1994	0.962711721177783
1995	1.02274932330406
1996	1.00106876499869
1997	0.890669266692691
1998	1.03819479930349
1999	0.865405726965878
2000	0.795675297640384
2001	0.740424378718501
2002	0.748443843785498
2003	0.711119399975182
2004	0.658967549260592
2005	0.754141654762032
2006	0.698729127682335
2007	0.731673904608851
2008	0.720050500407901
2009	0.780433442478007
2010	0.739281181264612
2011	0.730618102868789
2012	0.758092906861566
2013	0.763085821247434
2014	0.795017388442785