Year	kg per 2010 US$ of GDP
1980	1.03456036924226
1981	1.18104103307752
1982	1.47429704811941
1983	1.15915625160907
1984	1.23526877238623
1985	1.43592667585436
1986	1.53297571273968
1987	1.44129064614033
1988	1.43343001338755
1989	1.37828396482248
1990	1.39722408575465
1991	1.20055900677783
1992	1.03286548022937
1993	1.22905017573293
1994	1.24447342561275
1995	1.19979034745375
1996	1.214880721082
1997	1.30651021590929
1998	1.3249277860948
1999	1.2437292852388
2000	1.22199069943437
2001	0.890699987563517
2002	0.968952867384814
2003	0.958730391097801
2004	0.952840870890019
2005	0.978965902768354
2006	0.901407377055723
2007	1.18673270833823
2008	1.23857561977505
2009	1.1449585243624
2010	1.13817984048721
2011	1.09254696127907
2012	0.980577178484293
2013	1.09196040303921
2014	1.04729967287811