Year	kg per 2010 US$ of GDP
1992	2.93746631039818
1993	2.67042468438755
1994	2.4134480143651
1995	1.85603200613573
1996	2.17953243396615
1997	1.95355518008091
1998	2.03049378863924
1999	1.53670853812108
2000	1.44616765949034
2001	1.15366231049241
2002	1.46894741715205
2003	1.5054418410475
2004	1.51947150499524
2005	1.44898189246806
2006	1.38417873133411
2007	1.53503875665072
2008	1.63615183032276
2009	1.40983607086738
2010	1.33161671967057
2011	1.50724649779472
2012	1.99849990853681
2013	1.75054876399126
2014	1.64308357275919