Year	kg per 2010 US$ of GDP
1960	0.630610139678734
1961	0.614841764096948
1962	0.607575423228059
1963	0.609345406631779
1964	0.601457060998578
1965	0.594965718157644
1966	0.585403519172527
1967	0.584809999001891
1968	0.580587382691389
1969	0.584208624633124
1970	0.617908989561737
1971	0.606400069822172
1972	0.603132248314069
1973	0.596871898249629
1974	0.575926025810808
1975	0.557948508677659
1976	0.560435734610585
1977	0.550934116834939
1978	0.542905089636448
1979	0.535422369946307
1980	0.516511204226157
1981	0.485994148194385
1982	0.468077973087041
1983	0.454640927731146
1984	0.44655728363438
1985	0.435955009422688
1986	0.423772241569567
1987	0.420718518413552
1988	0.416058797566002
1989	0.410828736905942
1990	0.390209053776832
1991	0.389226929469957
1992	0.38569163755043
1993	0.386637062363716
1994	0.379603021293331
1995	0.371544960105105
1996	0.370757857245181
1997	0.361354369795022
1998	0.351772034340873
1999	0.34544041076263
2000	0.342939015847779
2001	0.336919351173414
2002	0.333918139960785
2003	0.331848899991629
2004	0.326734731858467
2005	0.318223864472492
2006	0.309249723081876
2007	0.302948601311389
2008	0.298043635975034
2009	0.292134966327423
2010	0.293727618668278
2011	0.283527246913595
2012	0.277174408499131
2013	0.272868440021379
2014	0.267261741075326