Year	kg per 2010 US$ of GDP
1960	0.810508465274949
1961	0.845057180615716
1962	0.903251414729761
1963	0.915226072222116
1964	0.832752424208296
1965	0.942299670650839
1966	0.975733933143777
1967	0.907407710094579
1968	0.954602282491856
1969	0.912212042818017
1970	0.887572194782851
1971	0.921222269031993
1972	0.980254500737797
1973	0.977270515128415
1974	0.998753594102788
1975	0.994737216237238
1976	1.02340689067648
1977	1.00940334062686
1978	0.968696978936651
1979	1.07205787346101
1980	1.0623377161671
1981	1.08136306417625
1982	1.07834736237024
1983	1.08854359630601
1984	1.07464916833748
1985	1.12242667373856
1986	1.14883388631527
1987	1.17966028961614
1988	1.1621540686354
1989	1.20388030125889
1990	1.21985294605329
1991	1.28319853590326
1992	1.29209508721561
1993	1.27691590063405
1994	1.26507671670015
1995	1.24801760061277
1996	1.26159121955398
1997	1.26108047356484
1998	1.21162180746627
1999	1.18395273711259
2000	1.18147911410799
2001	1.13726579904547
2002	1.10938093218065
2003	1.07276671049898
2004	1.0434797709636
2005	1.02403140541933
2006	1.01054948842227
2007	1.01343965643251
2008	1.09538030828498
2009	1.12578861416928
2010	1.02630417314326
2011	1.04442275404062
2012	1.08541570549921
2013	1.02847362453299
2014	1.05334159977215