Year	kg per 2010 US$ of GDP
1960	0.194877272111407
1961	0.205201418053324
1962	0.192004781354301
1963	0.197086111869083
1964	0.207659516073329
1965	0.233140470969849
1966	0.237285705728793
1967	0.253846271843723
1968	0.27213122015178
1969	0.291406056132296
1970	0.302261402925116
1971	0.311455764309102
1972	0.31392003526335
1973	0.326820902953037
1974	0.315797857746526
1975	0.308338083329458
1976	0.288406372235961
1977	0.287886346820182
1978	0.292907200772947
1979	0.296449514112213
1980	0.320270005375885
1981	0.303377436285105
1982	0.306598527217333
1983	0.30647098168019
1984	0.293104613971786
1985	0.306991790734433
1986	0.263072813031663
1987	0.282872065105235
1988	0.303330018805759
1989	0.314413691002609
1990	0.270510586557603
1991	0.257309707162881
1992	0.268507239021258
1993	0.276252053503831
1994	0.285345011870771
1995	0.299690319207033
1996	0.298178874348067
1997	0.295460592273297
1998	0.277875316858783
1999	0.270185170472785
2000	0.271918246763213
2001	0.270999973916601
2002	0.279966551345944
2003	0.284271914809146
2004	0.291416695931266
2005	0.281506140571408
2006	0.285703400877528
2007	0.286902816042292
2008	0.281681693333542
2009	0.278147320602003
2010	0.294038477778075
2011	0.304301918402276
2012	0.306141763390686
2013	0.314960195990245
2014	0.319713124232325