Year	kg per 2011 PPP $ of GDP
1990	0.226502507871386
1991	0.22448998105111
1992	0.24471876890303
1993	0.276078189025584
1994	0.290947232826795
1995	0.317009867510882
1996	0.303083229903219
1997	0.321533385085345
1998	0.30747039762944
1999	0.290942080150028
2000	0.300766072832818
2001	0.230414850851396
2002	0.271111663723581
2003	0.281645048018518
2004	0.270898299484466
2005	0.284420586445026
2006	0.33535187812395
2007	0.262678717405247
2008	0.265638715582824
2009	0.27160565725616
2010	0.283472792118823
2011	0.286152879454415
2012	0.316846238001605
2013	0.298651829050965
2014	0.305529219350746