Year	kg per 2010 US$ of GDP
1975	0.536670605255899
1976	0.555314993965965
1977	0.516999740931545
1978	0.504731023564157
1979	0.491015759450098
1980	0.49605048816534
1981	0.459539629731555
1982	0.441262995452459
1983	0.417439193698902
1984	0.394271557360668
1985	0.366389388192566
1986	0.403834759805497
1987	0.438424682612626
1988	0.40425018248651
1989	0.393777817258273
1990	0.369419260573545
1991	0.393142359055411
1992	0.39701246141812
1993	0.414621017918787
1994	0.405485351098439
1995	0.356582657987852
1996	0.388411879114432
1997	0.373509602412507
1998	0.384820312170562
1999	0.364824396167296
2000	0.374181532859608
2001	0.355573821345925
2002	0.351624756600955
2003	0.37806311531984
2004	0.340719149465093
2005	0.332423219934155
2006	0.329561311951686
2007	0.329962537993921
2008	0.333166656119706
2009	0.321556951417629
2010	0.301539555667476
2011	0.289326395945373
2012	0.27759891087357
2013	0.253304321461892
2014	0.261576004986351