Year	kg per 2010 US$ of GDP
2000	0.620782155204037
2001	0.630776934610709
2002	0.615868456530541
2003	0.622032312379456
2004	0.580021077906214
2005	0.592294876063908
2006	0.581729444275029
2007	0.582791648463285
2008	0.562103677696478
2009	0.53906629985678
2010	0.531077858474094
2011	0.522156911918652
2012	0.532433924518605
2013	0.504512031036676
2014	0.563249306114949