Year	kg per 2010 US$ of GDP
1960	0.67959081311793
1961	0.724882850494043
1962	0.65988944424924
1963	0.683130166575525
1964	0.646304418523579
1965	0.971153156997862
1966	1.01074868669503
1967	1.08630928426141
1968	1.08124670411013
1969	1.03840318114112
1970	1.15089486505868
1971	1.05917786433576
1972	1.14105895340235
1973	1.30164095800448
1974	1.04151326251429
1975	1.12762973095476
1976	1.06596050779187
1977	1.18646934931759
1978	1.30859575785316
1979	0.98613677085294
1980	1.13983825479393
1981	1.12993968470264
1982	1.01532121370037
1983	0.967012784633731
1984	1.14699061151383
1985	1.13180995066278
1986	0.841078221306102
1987	1.04416991174375
1988	1.16317827429532
1989	1.03168147384999
1990	1.01819768768668
1991	0.94450513949177
1992	0.821725075620929
1993	0.7596249358251
1994	0.928296371426385
1995	0.932928588848671
1996	0.896666621845295
1997	0.885268372120633
1998	0.937730038958062
1999	0.922859733792195
2000	0.896805832668067
2001	0.868829328268392
2002	0.851199181619014
2003	0.848664896554183
2004	0.868869009900191
2005	0.782373348454609
2006	0.668260195841509
2007	0.755699337654472
2008	0.739311810429858
2009	0.717310906201134
2010	0.756556420175412
2011	0.745253956597708
2012	0.792385067217526
2013	0.732452843591469
2014	0.732036386678164