Year	kg per 2010 US$ of GDP
1986	0.183049755962773
1987	0.39262809624944
1988	0.452976027246217
1989	0.428164650831758
1990	1.04009483432284
1991	0.989244560285473
1992	0.812157571098567
1993	0.825136508756191
1994	0.771340787746958
1995	0.777824204275033
1996	0.778845751805106
1997	0.751248297021692
1998	0.758239786860097
1999	0.753552791689521
2000	0.921790515361658
2001	0.961728536657641
2002	1.00638455878772
2003	1.03734555494283
2004	0.98192088344746
2005	1.00818470556469
2006	0.996358161107302
2007	1.0170428666649
2008	0.958474707410258
2009	1.05933813263031
2010	1.04924704837579
2011	1.01132815270179
2012	0.553281188786675
2013	0.339082672105212
2014	0.340522976483123