Year	kg per 2010 US$ of GDP
1960	0.499033822305035
1961	0.514483067435916
1962	0.503023006907627
1963	0.495910537220397
1964	0.516676382039977
1965	0.546393403567991
1966	0.549164927376755
1967	0.574429359694586
1968	0.569919717584811
1969	0.567295063433857
1970	0.568407272121588
1971	0.608474168769467
1972	0.624786918438693
1973	0.636042493238923
1974	0.625459539521075
1975	0.607826430860847
1976	0.607243689270204
1977	0.597931534848479
1978	0.610278109750192
1979	0.661267876957436
1980	0.657827082164213
1981	0.705558069212024
1982	0.753072134130432
1983	0.784636183078117
1984	0.820515187560025
1985	0.826649539996003
1986	0.823787182564954
1987	0.789472006653054
1988	0.80432062537595
1989	0.746668688159133
1990	0.664787332287892
1991	0.684252769236927
1992	0.662638478917039
1993	0.70093990136237
1994	0.705043257614216
1995	0.731736998134072
1996	0.710065584509767
1997	0.714525716647117
1998	0.680716476545309
1999	0.671708604557401
2000	0.699320257570033
2001	0.681042865882284
2002	0.637882959753468
2003	0.670686750370665
2004	0.694697924545909
2005	0.627810319618476
2006	0.620803602008975
2007	0.603379519061105
2008	0.599573466500051
2009	0.573497955355757
2010	0.545140222711628
2011	0.529828357918773
2012	0.515928718935313
2013	0.5019002386734
2014	0.50313298956347