Year	kg per 2011 PPP $ of GDP
1992	0.639272982380514
1993	0.662902856155337
1994	0.683141130195006
1995	0.715281738146922
1996	0.765733157488864
1997	0.683667543796265
1998	0.785150246426439
1999	0.698733553303235
2000	0.68777187629163
2001	0.705653184700091
2002	0.633646021745005
2003	0.641071563345536
2004	0.606088447389747
2005	0.583300962126948
2006	0.538026826428543
2007	0.438572352820436
2008	0.411803500557021
2009	0.382337540175006
2010	0.365858384873677
2011	0.390560827426188
2012	0.374285940724315
2013	0.318286854310094
2014	0.29393471826602