Year	kg per 2011 PPP $ of GDP
1992	0.246179176921313
1993	0.289940140188158
1994	0.312644505531365
1995	0.420120460960422
1996	0.382035194915839
1997	0.408250314224233
1998	0.371056185154881
1999	0.394442317978424
2000	0.373532918581123
2001	0.399087258534909
2002	0.391407256056775
2003	0.343330430501011
2004	0.328655138789696
2005	0.336224378806545
2006	0.322420483177536
2007	0.310242697562152
2008	0.332895251329018
2009	0.378046091062151
2010	0.39750669748808
2011	0.368276513705795
2012	0.388285090887324
2013	0.368908262842431
2014	0.356106466703017