Year	kg per 2011 PPP $ of GDP
2000	0.401481256713227
2001	0.41123054208827
2002	0.401555082064618
2003	0.406904722531969
2004	0.384650234403405
2005	0.393922765187616
2006	0.389385552609435
2007	0.385955959610156
2008	0.370274404020131
2009	0.357100524099876
2010	0.353289710434026
2011	0.34351604936828
2012	0.343814101107422
2013	0.331164078603058
2014	0.356797079774366