Year	kg per 2010 US$ of GDP
2002	0.143435707708318
2003	0.147141205679793
2004	0.115270468024635
2005	0.144845844147521
2006	0.170901126101328
2007	0.206862327353743
2008	0.368241871710833
2009	0.488221213951117
2010	0.53374932123382
2011	0.768670412021069
2012	0.599018913476826
2013	0.528181507175732
2014	0.503629381060578