Year	kg per 2011 PPP $ of GDP
1992	0.338056544381034
1993	0.312608189815156
1994	0.325928427323825
1995	0.315237279865797
1996	0.325361058974093
1997	0.358314847755409
1998	0.371229976265222
1999	0.343277991131398
2000	0.372070053901357
2001	0.494744749177384
2002	0.416956186517445
2003	0.408993778296148
2004	0.422212227176486
2005	0.350056701490021
2006	0.350514880217542
2007	0.411702469568023
2008	0.354559979253513
2009	0.481847695370663
2010	0.332690430124235
2011	0.342684450160334
2012	0.39202113870341
2013	0.429795227222455
2014	0.461792527131151