Year	kg per 2010 US$ of GDP
1960	1.08878967615286
1961	0.925266978114041
1962	0.851674849443823
1963	0.838482433060756
1964	0.816169149366892
1965	0.838101656021599
1966	0.867282239952936
1967	0.822707552706293
1968	0.839236147027634
1969	0.868345029814161
1970	0.923991882735166
1971	0.947020011845928
1972	0.939325631305359
1973	0.93564639646342
1974	0.913187056148299
1975	0.943589649123109
1976	0.937853825592083
1977	0.960206775913217
1978	1.00855400604097
1979	1.00940529358513
1980	0.977655871682855
1981	0.966212510642265
1982	0.998188659545042
1983	1.0230136887645
1984	1.02893313895369
1985	1.04822518059946
1986	1.05202572110054
1987	1.05994685454399
1988	1.08006907588403
1989	1.08179587892683
1990	1.05783918421093
1991	1.08824388031678
1992	1.11969738080962
1993	1.09664133116858
1994	1.0628624579848
1995	1.0646776971242
1996	1.04423537084611
1997	0.994727746685981
1998	0.964237967762126
1999	0.951552353360352
2000	0.924565930700484
2001	0.913322179736041
2002	0.912909333885431
2003	0.947204506800331
2004	0.949714663163985
2005	0.946995962703671
2006	0.935377195870154
2007	0.90540176924974
2008	0.911827289778998
2009	0.913032220195191
2010	0.905226466521134
2011	0.923639499585503
2012	0.911610667037106
2013	0.872166867715273
2014	0.845912146026791