Year	kg per 2010 US$ of GDP
1960	0.562679289909498
1961	0.496150370719607
1962	0.476318082110609
1963	0.476206686215091
1964	0.431563141279502
1965	0.444941167019732
1966	0.41121883828701
1967	0.461494616378191
1968	0.42877450282674
1969	0.447581351559034
1970	0.449037276253011
1971	0.371285502724627
1972	0.366668904494288
1973	0.363793972928299
1974	0.402683119764431
1975	0.33240473543395
1976	0.277266079992259
1977	0.289968901386165
1978	0.305359279868223
1979	0.33780909420542
1980	0.419126137754389
1981	0.426054435821481
1982	0.441864704717214
1983	0.457654762316405
1984	0.451717081064026
1985	0.489827485559015
1986	0.497352255960389
1987	0.486520632903938
1988	0.480947998845964
1989	0.493213533143302
1990	0.519883289294041
1991	0.447716046546739
1992	0.387510429032428
1993	0.453615282978015
1994	0.485344389369081
1995	0.479053418738594
1996	0.442041026449894
1997	0.453413132399806
1998	0.564612883687037
1999	0.621213843622942
2000	0.527487392260349
2001	0.577664374372634
2002	0.709915539516686
2003	0.764768273971358
2004	0.510669895293871
2005	0.503673966884561
2006	0.470687658414074
2007	0.4105191568274
2008	0.434386814031685
2009	0.450447860849177
2010	0.480860112947281
2011	0.43168166215083
2012	0.459406434916266
2013	0.419463785499185
2014	0.439541808887749