Year	kg per 2011 PPP $ of GDP
1992	0.844443750139674
1993	0.827691837778472
1994	0.814377511123225
1995	0.805712806359238
1996	0.792324352732281
1997	0.724377361502188
1998	0.726860141122313
1999	0.712441242382706
2000	0.668666921180971
2001	0.64759243836947
2002	0.618033105949121
2003	0.604572525053546
2004	0.564328261692793
2005	0.530450591555674
2006	0.508357400427679
2007	0.477836200684938
2008	0.46488132906134
2009	0.449710943454259
2010	0.459449996058071
2011	0.456009625833673
2012	0.449046035281514
2013	0.421008429873054
2014	0.398521228488682