Year	kg per 2010 US$ of GDP
1970	0.70543326622823
1971	0.73222681312719
1972	0.718982453080831
1973	0.629304247560906
1974	0.63194402240541
1975	0.639955169313617
1976	0.704834103282673
1977	0.618984463317432
1978	0.59646261170096
1979	0.640322650650798
1980	0.611673919663129
1981	0.629725939227621
1982	0.589520764818638
1983	0.689130309606987
1984	0.584345084257313
1985	0.616604781879179
1986	0.672037013466144
1987	0.651288569843832
1988	0.620928216773131
1989	0.664735676019261
1990	0.69183762035471
1991	0.765450511822784
1992	0.771728318438282
1993	0.855419119235509
1994	0.8028045892391
1995	0.941831679425765
1996	0.88617813427923
1997	0.822066522815893
1998	0.811771020604415
1999	0.722950987378347
2000	0.773638205314098
2001	0.830170314053851
2002	0.776800365246312
2003	0.868885667161356
2004	0.842329032390715
2005	0.851723054818547
2006	0.775308739047455
2007	0.803798553126919
2008	0.846468667078911
2009	0.837758465698714
2010	0.856713582919991
2011	0.82082349609039
2012	0.772232734946907
2013	0.797654613570486
2014	0.772534745815937