Year	kg per 2010 US$ of GDP
1960	0.238264969131258
1961	0.241330664227238
1962	0.248739470603207
1963	0.234929709827072
1964	0.307803523217276
1965	0.311149745388311
1966	0.296323612452808
1967	0.269171507187524
1968	0.402167735587613
1969	0.409628076874046
1970	0.40581817922213
1971	0.414800473149761
1972	0.498516945005522
1973	0.563481480793408
1974	0.571763570793308
1975	0.537013914787158
1976	0.502578624172861
1977	0.424397598564144
1978	0.403290295713909
1979	0.482129940687173
1980	0.423461105968214
1981	0.387864196812854
1982	0.392042595603974
1983	0.467672681544082
1984	0.434489360316156
1985	0.434945836965934
1986	0.471267336948411
1987	0.510262422703254
1988	0.503624674914738
1989	0.508476978630054
1990	0.478836201867255
1991	0.516196061257877
1992	0.504785213130898
1993	0.506302092382698
1994	0.523312142062604
1995	0.630521395959319
1996	0.64893050596809
1997	0.619184792435635
1998	0.592990870314268
1999	0.564762532196388
2000	0.575318197306836
2001	0.562236105665191
2002	0.579170609438551
2003	0.592117023479988
2004	0.491283412551556
2005	0.457047399858432
2006	0.444336454659613
2007	0.44271934099044
2008	0.419591529008412
2009	0.405944347977366
2010	0.389436587355472
2011	0.381293082585189
2012	0.386851976359388
2013	0.357496476154181
2014	0.333668289682393