Year	kg per 2010 US$ of GDP
1965	0.58809422807425
1966	0.651020302726498
1967	0.604398657505686
1968	0.687480640602698
1969	0.621062968744605
1970	0.597354065408133
1971	0.58237962572292
1972	0.535046265239994
1973	0.578641566999003
1974	0.560003245416576
1975	0.569088932553476
1976	0.585404860418213
1977	0.615456128143883
1978	0.699278616510415
1979	0.752815291146598
1980	0.796633085302142
1981	0.747935287959158
1982	0.692716682427858
1983	0.73819932438792
1984	0.811525515206923
1985	0.819435958408423
1986	0.86311354906635
1987	0.901168653434626
1988	0.976832195884592
1989	0.979448916802586
1990	0.864270213034551
1991	0.930443955884046
1992	0.916998680935613
1993	0.94381096213808
1994	0.992046091073768
1995	1.00977821194999
1996	0.962843749523112
1997	0.924174935472679
1998	0.972716121478316
1999	1.01047049540895
2000	0.972902247958265
2001	0.979303749552224
2002	0.95053466689818
2003	0.990577648485112
2004	0.97257428695842
2005	0.987802694124123
2006	0.967408215491479
2007	0.916175002238762
2008	0.946860895658447
2009	0.958799719611076
2010	0.93070001088399
2011	0.958572022973932
2012	0.975986574707451
2013	0.974656815232089
2014	0.975074837735632