Year	kg per 2010 US$ of GDP
1974	1.1566444030976
1975	0.997118846587278
1976	0.706088180059676
1977	0.675726467621306
1978	0.94418863328932
1979	0.600725633458362
1980	0.597530454290589
1981	0.159224711584046
1982	0.218097109580448
1983	0.280477331535971
1984	0.197581212473017
1985	0.271518983054285
1986	0.24716711944915
1987	0.349729842058943
1988	0.595923321829296
1989	0.668854525274422
1990	0.645592600918566
1991	0.536593382932554
1992	0.503021723491494
1993	0.477865532458668
1994	0.437649591872313
1995	0.427397467461732
1996	0.422438010300138
1997	0.445533824664327
1998	0.466541987018132
1999	0.335841285949876
2000	0.393620902158523
2001	0.36641248800577
2002	0.342707659870057
2003	0.349214079254923
2004	0.378267082474875
2005	0.377359836651521
2006	0.351136143744561
2007	0.606797634626829
2008	0.670569539575754
2009	0.588470253647644
2010	0.59844292223114
2011	0.681788535224342
2012	0.673576943936219
2013	0.555579508955146
2014	0.664129564087482