Year	kg per 2011 PPP $ of GDP
1990	0.287653476088732
1991	0.316061963335175
1992	0.323121748789305
1993	0.345705062867711
1994	0.344915944295451
1995	0.322733351113018
1996	0.306825027132502
1997	0.284318203864708
1998	0.292274757950911
1999	0.289938360639235
2000	0.313138880512284
2001	0.30617140380238
2002	0.310794674961951
2003	0.320291933447439
2004	0.32138538651719
2005	0.320253288298282
2006	0.31623096997459
2007	0.297617254798697
2008	0.308420436409678
2009	0.323884568918263
2010	0.321540775666568
2011	0.314089718408564
2012	0.319736950208431
2013	0.306431374863655
2014	0.319723442332904