Year	kg per 2011 PPP $ of GDP
1990	0.0847913105354184
1991	0.0673975449540751
1992	0.0715765798412488
1993	0.0761478537786258
1994	0.0500982291058934
1995	0.0644412490405924
1996	0.0710671559207562
1997	0.0617146192488754
1998	0.0551037570774712
1999	0.0476939996754765
2000	0.0301700940908
2001	0.0316502112379395
2002	0.0341149990718127
2003	0.0343561446662957
2004	0.0391272489004797
2005	0.0461100534475678
2006	0.0469917856455128
2007	0.048253104946798
2008	0.0480803160928124
2009	0.0439796789885133
2010	0.0474311287484721
2011	0.0547704089228441
2012	0.0492654017126661
2013	0.0678775112604558
2014	0.0806893813318944