Year	kg per 2010 US$ of GDP
1990	0.818365611401721
1991	0.738726500978629
1992	0.737885629672329
1993	0.620609434135603
1994	0.605525415819358
1995	0.661589730583741
1996	0.642696111583599
1997	0.766960424841691
1998	0.660744096556905
1999	0.725120417426506
2000	0.719671464169689
2001	0.767440358758919
2002	0.718169608182754
2003	0.759857825755141
2004	0.797417840985571
2005	0.801683054669971
2006	0.826377046693157
2007	0.786748944358692
2008	0.808568549175826
2009	0.855909263399712
2010	0.758155754127858
2011	0.728996167283852
2012	0.675850001486116
2013	0.880563573597965
2014	0.785415343122708