Year	kg per 2010 US$ of GDP
1975	0.546951419998301
1976	0.599006754965592
1977	0.482490379436121
1978	0.566489566538679
1979	0.382679564661245
1980	0.311431078591057
1981	0.297182533535935
1982	0.318716363577545
1983	0.320719354490891
1984	0.404756013564351
1985	0.451803774827122
1986	0.502630712310387
1987	0.490905998004273
1988	0.511239901762543
1989	0.512676324971993
1990	0.413555986321434
1991	0.44946252858706
1992	0.443502945099196
1993	0.49707074471645
1994	0.51539838658179
1995	0.466642105929968
1996	0.256365756905309
1997	0.240343976343722
1998	0.468948960068001
1999	0.438272394952285
2000	0.567824497719972
2001	0.5045307836176
2002	0.41138613720403
2003	0.476930776305111
2004	0.461359255597401
2005	0.451295564651673
2006	0.438208429685112
2007	0.464977126866294
2008	0.522778260166476
2009	0.588885888530892
2010	0.554933210433885
2011	0.53390184540584
2012	0.54479428915195
2013	0.50188809781286
2014	0.595257645406862