Year	kg per 2010 US$ of GDP
1960	0.450706838025228
1961	0.426419168464157
1962	0.473553529796576
1963	0.481658682803758
1964	0.514642594545054
1965	0.604315167836995
1966	0.698551925212869
1967	0.75861823317536
1968	0.767016678421919
1969	0.76920381215286
1970	0.792295898769619
1971	0.81293007913291
1972	0.831817223140694
1973	1.02323953710037
1974	0.774563793024181
1975	0.950023261618223
1976	0.863674798464576
1977	0.744906751035899
1978	0.880903077260719
1979	0.849577289718725
1980	0.962804261336274
1981	0.76975765586236
1982	0.741138959297095
1983	0.565961153756606
1984	0.652307248910095
1985	0.657616445904554
1986	0.718235524142152
1987	0.765709514010823
1988	0.757659383065749
1989	0.718599387879509
1990	0.718257360564953
1991	0.810868709392069
1992	0.813407000373131
1993	0.860998403436843
1994	0.834181997509231
1995	0.841656746590855
1996	0.842204397392079
1997	0.805189497214017
1998	0.787086497916264
1999	0.805203578606661
2000	0.814476932547906
2001	0.842979018412234
2002	0.54202460780795
2003	0.502735975151697
2004	0.468854110521002
2005	0.45814303912248
2006	0.473841530070487
2007	0.455588640210027
2008	0.482000120941424
2009	0.482007234224028
2010	0.549831991911949
2011	0.42586772031553
2012	0.475720114855387
2013	0.392388255024198
2014	0.406355291475024