Year	kg per 2011 PPP $ of GDP
2000	1.05682652710803
2001	1.00556815068968
2002	0.953222315458923
2003	0.999583578128881
2004	0.953386851714123
2005	0.938836915282804
2006	0.973469260908355
2007	0.951133430691093
2008	0.976643775888013
2009	1.00811514050045
2010	1.0338981548642
2011	0.981052770754956
2012	0.946987577563517
2013	0.981359358757045
2014	0.950016880071045