Year	kg per 2011 PPP $ of GDP
2005	0.284752769841397
2006	0.303894568120014
2007	0.268760618057879
2008	0.30617619377818
2009	0.215807221554602
2010	0.296957055328595
2011	0.286443913690948
2012	0.267580386265112
2013	0.248673410691188
2014	0.240330024698289