Year	kg per 2010 US$ of GDP
1968	1.46375560383901
1969	1.62685213300956
1970	1.64440926805747
1971	1.88389407566861
1972	1.85943569938935
1973	1.84659595528165
1974	1.60575314191032
1975	1.52963314704328
1976	1.92132233957861
1977	1.68884452878606
1978	1.39676058776415
1979	1.4470989150825
1980	0.99725961029634
1981	0.708316416102237
1982	0.652827524947017
1983	0.950295235790991
1984	1.00086286727283
1985	1.09620319139639
1986	1.11965770703846
1987	1.13438849270303
1988	1.45741720622322
1989	1.62224690610573
1990	0.669261912348411
1991	1.78148923564437
1992	1.74006530690714
1993	1.4315568260827
1994	1.55185494434154
1995	1.58385165306423
1996	1.33360525678869
1997	1.08112779649822
1998	0.849368482287223
1999	0.721482611294365
2000	0.713063998568634
2001	0.821076567731725
2002	0.901750539560895
2003	1.40751556853023
2004	1.14316865625017
2005	1.08959767122028
2006	0.860584308197687
2007	0.53420032506124
2008	0.739711370195515
2009	0.80307853231796
2010	0.809978245614708
2011	0.902092279054482
2012	0.899796045569229
2013	0.906236359406968
2014	0.915908117836403