Year	kg per 2011 PPP $ of GDP
1990	0.499213264059311
1991	0.513736150925647
1992	0.525590639832968
1993	0.515018669181315
1994	0.498234093964328
1995	0.497558031688169
1996	0.487171348279384
1997	0.464696587277409
1998	0.449354951214559
1999	0.44059655420016
2000	0.426938354825487
2001	0.420302673054078
2002	0.418175131694584
2003	0.432101353239569
2004	0.432521574495005
2005	0.430376029064032
2006	0.424998383889193
2007	0.4114768275839
2008	0.414014294391318
2009	0.411670460311037
2010	0.408153756773567
2011	0.416458449362317
2012	0.410022376573503
2013	0.392283674342464
2014	0.378948044474001