Year	kg per 2010 US$ of GDP
1980	0.626493687421669
1981	0.157546752625424
1982	0.170242544272227
1983	0.155443187393104
1984	0.34448647518699
1985	0.317083817068374
1986	0.214422986187966
1987	0.282651953214175
1988	0.242418816396696
1989	0.252285592704828
1990	0.296106137070343
1991	0.303236942664026
1992	0.293587385807693
1993	0.279381663574198
1994	0.242228550476348
1995	0.225770514582468
1996	0.239630019618951
1997	0.22118237979484
1998	0.211319582469884
1999	0.220926625984247
2000	0.228108428810777
2001	0.242038195330838
2002	0.269487988933054
2003	0.289726804963081
2004	0.281696754184377
2005	0.351311418064654
2006	0.34973759742185
2007	0.324855135899333
2008	0.282525492781265
2009	0.319695442890179
2010	0.334903799336671
2011	0.356026542035374
2012	0.289320166054061
2013	0.282856356129143
2014	0.277003622605905