Year	kg per 2011 PPP $ of GDP
1992	0.844148333035773
1993	0.826869357035375
1994	0.80729256278804
1995	0.796680812999792
1996	0.782044616568145
1997	0.716033209169929
1998	0.708471945050925
1999	0.690310103805363
2000	0.646146628813739
2001	0.627887919962486
2002	0.600052218248963
2003	0.588147467875926
2004	0.550795706832297
2005	0.519219955276598
2006	0.499483297016236
2007	0.468888303437386
2008	0.455605761248912
2009	0.438264554553518
2010	0.448022874095481
2011	0.443242332268534
2012	0.434528231898429
2013	0.409836534034666
2014	0.386771639139448