Year	kg per 2010 US$ of GDP
1980	0.97126966912458
1981	1.30413435750927
1982	1.26108723768692
1983	1.30237947654266
1984	1.35247671364016
1985	1.33815555858443
1986	1.29504000684734
1987	1.20610265265384
1988	1.2041901750507
1989	1.34436996414374
1990	0.91267280498398
1991	0.985285761654226
1992	0.622964816925987
1993	0.527994191513669
1994	0.401799196685779
1995	0.384278882430935
1996	0.340464781210209
1997	0.292557552519433
1998	0.305216589847922
1999	0.460415110284677
2000	0.43578415904954
2001	0.429283768881622
2002	0.477913055483227
2003	0.518386888997861
2004	0.476630497500027
2005	0.46119638850991
2006	0.399084507436579
2007	0.379399918649113
2008	0.393133329957661
2009	0.380709130687002
2010	0.385548422770662
2011	0.428447306379265
2012	0.39585191748211
2013	0.404218264279534
2014	0.448382437642478