Year	kg per 2011 PPP $ of GDP
1992	1.32893688909032
1993	1.12250413225091
1994	1.60744313664859
1995	1.75621445406821
1996	1.48475145948783
1997	1.67318706933334
1998	1.6372833775912
1999	1.64995633393933
2000	1.5586127734885
2001	1.51503108183328
2002	1.5862435051417
2003	1.71417304039422
2004	1.70354273552682
2005	1.56529084894305
2006	1.44475201629082
2007	1.47247825142045
2008	1.30182472153896
2009	1.08684783369576
2010	1.13266966124729
2011	1.07675663239453
2012	1.00649991217232
2013	0.939565991995969
2014	0.873358630503409