Year	kg per 2010 US$ of GDP
1992	3.02023576307392
1993	2.87047530432615
1994	2.75485193056324
1995	2.87219081000771
1996	2.76597468950401
1997	2.45780021601096
1998	2.21191990889896
1999	2.06600908177012
2000	1.8718422605139
2001	1.75326328342249
2002	1.65780267773377
2003	1.58199287594854
2004	1.5421807412543
2005	1.43411419352606
2006	1.3677354198169
2007	1.22802660810519
2008	1.1618934154783
2009	1.12494004839116
2010	1.07462658153056
2011	1.03626591635077
2012	1.00571458241754
2013	1.00432802022398
2014	0.983082496641691