Year	kg per 2010 US$ of GDP
1960	1.90583144536739
1961	1.57704715464515
1962	1.40804652221263
1963	1.39651784118615
1964	1.36391505715294
1965	1.37108387262602
1966	1.38705355206526
1967	1.26486391953884
1968	1.28035784458063
1969	1.35046019817703
1970	1.45704534261549
1971	1.47932473722335
1972	1.45104205000409
1973	1.39345079717595
1974	1.33405057085289
1975	1.40993621917136
1976	1.38409267868408
1977	1.39159605374141
1978	1.43911335441792
1979	1.37503933868697
1980	1.26939461990164
1981	1.22709803382951
1982	1.26759140776968
1983	1.30869539610509
1984	1.29284380447549
1985	1.28662464632203
1986	1.27072095949255
1987	1.2663646238004
1988	1.26856074676885
1989	1.23497652784292
1990	1.22337744567877
1991	1.2468872336419
1992	1.30718762591968
1993	1.27285757028251
1994	1.21857285121307
1995	1.20527307999291
1996	1.18062253806267
1997	1.11411443349722
1998	1.06104855585995
1999	1.02075043559349
2000	0.981898012688782
2001	0.95849880086235
2002	0.955295748276094
2003	1.00121809674065
2004	1.01761594134426
2005	1.02861669202715
2006	1.02106930855831
2007	0.981700536873962
2008	0.978225497945026
2009	0.973190867900806
2010	0.982255071982773
2011	0.998824920477825
2012	0.975574154410132
2013	0.942327605976655
2014	0.903124151781284