Year	kg per 2010 US$ of GDP
1980	1.42171846774659
1981	1.0507176190299
1982	1.15186025067395
1983	1.0627417885464
1984	0.88357090041712
1985	0.653507173632796
1986	0.572725123234505
1987	0.499324429924328
1988	0.475258465524647
1989	0.459186903587284
1990	0.446636296163861
1991	0.425773403079359
1992	0.441224993404313
1993	0.435270422078856
1994	0.40443950272944
1995	0.414686349034695
1996	0.305414773322937
1997	0.297855482671418
1998	0.268011383397825
1999	0.260632436884402
2000	0.291140168924837
2001	0.302501045429308
2002	0.279339487223774
2003	0.316806470000191
2004	0.294414921092176
2005	0.256845999993124
2006	0.254042245969473
2007	0.270201463009819
2008	0.253226983213967
2009	0.265842894426149
2010	0.269402975644285
2011	0.296340886193315
2012	0.267636181327124
2013	0.321712068714907
2014	0.627804428233686