Year	kg per 2015 US$ of GDP
1992	0.37725355992847337
1993	0.4813332759007388
1994	0.4600012933257376
1995	0.48762111987869167
1996	0.4876141793886374
1997	0.4278141750259141
1998	0.3117001541690456
1999	0.3296471492763201
2000	0.33342657884911253
2001	0.3355044568310319
2002	0.3192425609113527
2003	0.330766581211375
2004	0.33484849706356307
2005	0.2736981834932493
2006	0.24814082352116654
2007	0.2386212784782072
2008	0.23008053234474174
2009	0.23062402230023749
2010	0.24261356515915286
2011	0.2644889507029285