Year	kg per 2010 US$ of GDP
1992	3.22739543565709
1993	3.61565392962107
1994	3.90087072650421
1995	3.51208629116222
1996	3.25113714091196
1997	2.93051063732919
1998	2.83091410340428
1999	2.37801114045325
2000	2.21018768092871
2001	1.96085628241708
2002	1.84425931811319
2003	1.72999892730258
2004	1.65971110595233
2005	1.38789550657269
2006	1.17731890427514
2007	0.730952428778975
2008	0.769147022462077
2009	0.631927564701231
2010	0.579897057091723
2011	0.642334489278254
2012	0.66811005472448
2013	0.632791833191699
2014	0.647427732328629