Year	kg per 2010 US$ of GDP
1960	0.353319048763736
1961	0.406265745264292
1962	0.352488844418169
1963	0.35721981642886
1964	0.339154170265017
1965	0.369918280459702
1966	0.341005435411946
1967	0.353127673737453
1968	0.357591090232124
1969	0.405192460773463
1970	0.404161267487931
1971	0.410996744606863
1972	0.426842454501586
1973	0.44762836375885
1974	0.433879488998475
1975	0.435098305668631
1976	0.466260918867248
1977	0.571737011571483
1978	0.610202511767049
1979	0.575595425168209
1980	0.522122683355731
1981	0.511210993882768
1982	0.526173503414788
1983	0.50283816419972
1984	0.502418801920516
1985	0.52995106810754
1986	0.502587604847961
1987	0.48541319675497
1988	0.491581101134577
1989	0.453331563140431
1990	0.482749272995855
1991	0.542606218956246
1992	0.574263610221778
1993	0.581888882336399
1994	0.548052640836386
1995	0.51449308074777
1996	0.537326055628436
1997	0.564606095131903
1998	0.499581931123694
1999	0.559963375853258
2000	0.580968314945747
2001	0.627551382409996
2002	0.624619980841832
2003	0.615664143783219
2004	0.624741590090541
2005	0.598719866389255
2006	0.572692391262415
2007	0.585998153800613
2008	0.613126737583625
2009	0.627992487741249
2010	0.567823631153283
2011	0.752998479460709
2012	0.749483737587475
2013	0.546358495155764
2014	0.492659480651436