Year	kg per 2010 US$ of GDP
1990	1.36192896737785
1991	1.32073667713211
1992	1.28221674837969
1993	1.27593067607979
1994	1.23363029199084
1995	1.21784640371846
1996	1.17309508662755
1997	1.15267840510807
1998	1.15637580689768
1999	1.16493257938423
2000	1.13723313132134
2001	1.11334409391252
2002	1.12261421001902
2003	1.08811089606464
2004	1.0984275631221
2005	1.07732894385116
2006	1.04678536462961
2007	1.01648603795327
2008	0.975860364964117
2009	0.996456564837723
2010	0.964258961536434
2011	0.923795990415361
2012	0.898927841589352
2013	0.893417856755704
2014	0.878115211934695