Year	kg per 2011 PPP $ of GDP
1992	1.45727866016623
1993	1.33286203316605
1994	1.40141122980603
1995	1.29134389723524
1996	1.07504617725903
1997	0.966888802784747
1998	0.969339329231733
1999	0.863580922076116
2000	0.797347457816923
2001	0.784307441376436
2002	0.724516677717935
2003	0.704873957451712
2004	0.78261882605161
2005	0.731044158065944
2006	0.717370192633998
2007	0.760366826825059
2008	0.770698055687703
2009	0.697875147509257
2010	0.757741001916278
2011	0.735364260719957
2012	0.658110070453468
2013	0.671644916305194
2014	0.608935609311641