Year	kg per 2010 US$ of GDP
1960	1.04226778800842
1961	1.05495587880982
1962	1.1051681876011
1963	1.15912684849259
1964	1.23085315295805
1965	1.27063120098309
1966	1.16241347333237
1967	0.854180494531631
1968	1.0104988941453
1969	0.825363252800618
1970	0.86062406520278
1971	0.878951074509208
1972	0.944081498781782
1973	0.850738816738375
1974	0.919653508915232
1975	1.00499387196462
1976	0.984046100522803
1977	0.990963809652571
1978	0.947144227709624
1979	0.989686040608706
1980	0.947629417716475
1981	0.994741084298236
1982	1.00351090430111
1983	0.964468075077305
1984	0.982682454984651
1985	0.930326599850842
1986	1.03580991394603
1987	1.00086230448432
1988	0.945497154634206
1989	0.872732503797089
1990	0.868977229064355
1991	0.890674769656241
1992	0.880144335665608
1993	0.980500763790413
1994	0.863629750895597
1995	0.92602702878545
1996	0.940142059350306
1997	0.945100488759218
1998	1.01135419930677
1999	0.978199975500211
2000	1.03647200172319
2001	0.888634947553827
2002	0.879940751888143
2003	0.991951865307978
2004	0.97194448711184
2005	1.03080461713397
2006	1.03043110221258
2007	1.01883631511073
2008	0.998531775160648
2009	0.993088907907934
2010	0.926113475712581
2011	0.974916542075591
2012	0.953266895395954
2013	0.917166992188154
2014	0.843083079873305