Year	kg per 2010 US$ of GDP
1992	0.38954702243686
1993	0.36022254725119
1994	0.375571632917181
1995	0.363252082451642
1996	0.374917846871809
1997	0.412890933064472
1998	0.42777320627885
1999	0.395563764512186
2000	0.428741238837934
2001	0.570100910962082
2002	0.480464122479538
2003	0.47128893428813
2004	0.486520727572882
2005	0.403374962017617
2006	0.403902927418719
2007	0.474410195027488
2008	0.408564148481042
2009	0.555239465466877
2010	0.383363578082545
2011	0.394879819409465
2012	0.45173113744574
2013	0.495258718711182
2014	0.532129630138955