Year	kg per 2010 US$ of GDP
1966	0.558104522863021
1967	0.637985998556306
1968	0.601654170282461
1969	0.604464651038423
1970	0.813833048621384
1971	0.952652990705069
1972	0.902135207610076
1973	1.09027079475194
1974	1.08508378480344
1975	1.17880120794228
1976	1.2836982913779
1977	1.37165830413782
1978	1.2450083262567
1979	1.19769425115599
1980	1.21081879503534
1981	1.00511930396596
1982	0.963100920204078
1983	0.89326889787588
1984	0.892872198422415
1985	0.988427450983985
1986	0.851015712267018
1987	0.875454406976622
1988	0.794808045254373
1989	0.839516413068637
1990	0.87837723322216
1991	0.87993029260421
1992	0.91302292535114
1993	0.865854799504882
1994	0.834340178555867
1995	0.83169043661716
1996	0.903543544787784
1997	0.834721057318221
1998	0.832180582181494
1999	0.882075604156959
2000	0.884582715915529
2001	0.929244999672126
2002	0.917955153765777
2003	0.939473311343004
2004	0.93504165679008
2005	0.97942075386632
2006	1.00614159145928
2007	0.996696924183949
2008	0.979568492839335
2009	0.991844135641002
2010	1.02378778794165
2011	1.00432972872768
2012	0.969490713211011
2013	0.991159367564552
2014	0.966403094477406