Year	kg per 2010 US$ of GDP
1966	0.191436815090204
1967	0.191436815090204
1968	0.194118505724056
1969	0.246354048226088
1970	0.232072653208364
1971	0.267952657578749
1972	0.3207678778005
1973	0.277296592350141
1974	0.261900030097489
1975	0.370091805829485
1976	0.344748560903306
1977	0.382660522076457
1978	0.441199600813338
1979	0.470672018956047
1980	0.476119357626063
1981	0.460811681964892
1982	0.475161233001597
1983	0.428523991014286
1984	0.442111747991086
1985	0.445732273733149
1986	0.400880954127832
1987	0.435741072821101
1988	0.4255812134308
1989	0.393849328179497
1990	0.372552879231694
1991	0.368853959447072
1992	0.356798837722013
1993	0.360503330636179
1994	0.359947764034837
1995	0.377789631906646
1996	0.369572029081922
1997	0.352308896623451
1998	0.365609523366439
1999	0.373240214819097
2000	0.376244555555954
2001	0.366234153656314
2002	0.433396970112269
2003	0.405536607105178
2004	0.383624457684581
2005	0.387271298302435
2006	0.402114692626154
2007	0.44345759025336
2008	0.436881405492418
2009	0.426827580684701
2010	0.454615575425699
2011	0.491120496240629
2012	0.472701496349581
2013	0.429271372569195
2014	0.514139137140005