Year	kg per 2010 US$ of GDP
1986	0.34530438909881
1987	0.333044618915926
1988	0.323686612091611
1989	0.316784344904093
1990	0.291934164252971
1991	0.290728907040512
1992	0.290569393048759
1993	0.284273662046381
1994	0.313925139489613
1995	0.309778190235322
1996	0.313396790643055
1997	0.309972226402926
1998	0.316848022298569
1999	0.320846155064955
2000	0.325357445922842
2001	0.328587699685628
2002	0.327773583125097
2003	0.337549274495711
2004	0.34076091278533
2005	0.310869075492363
2006	0.318348349503997
2007	0.310130318779881
2008	0.331085994323997
2009	0.346045186989866
2010	0.3798908894138
2011	0.38402194193256
2012	0.336739593732915
2013	0.288554696564518
2014	0.296433380333174