Year	kg per 2010 US$ of GDP
1990	1.39487998451879
1991	1.29081672563653
1992	1.29743959926792
1993	1.2446454986494
1994	1.13871245266735
1995	1.13405180521482
1996	1.08584663113402
1997	1.02485930903652
1998	0.927256762177276
1999	0.836708514463003
2000	0.825151751606766
2001	0.835699704041355
2002	0.795561533261155
2003	0.80793852894038
2004	0.701537491649381
2005	0.667154947121005
2006	0.661710382043154
2007	0.610350951602278
2008	0.52637177639207
2009	0.471610896869685
2010	0.477740808751966
2011	0.500585388413432
2012	0.472157598789805
2013	0.395974375842323
2014	0.3778273946255