Year	kg per 2011 PPP $ of GDP
1992	1.40490410424604
1993	1.40013351810029
1994	1.48813280510706
1995	1.71093672289421
1996	1.75777101436555
1997	1.49948959310045
1998	1.47226622077347
1999	1.49278032476306
2000	1.36024630079615
2001	1.24899226895544
2002	1.17531186092797
2003	1.18682045945389
2004	1.03149239332595
2005	0.973712010301637
2006	0.886069064198821
2007	0.810489876556927
2008	0.766997589782929
2009	0.752471749292138
2010	0.848789187713105
2011	0.756588123904046
2012	0.779556346507648
2013	0.716716960386708
2014	0.641222441237468