Year	kg per 2011 PPP $ of GDP
1990	0.651206046313299
1991	0.66457137803279
1992	0.699352782970945
1993	0.682892519060739
1994	0.656548538901195
1995	0.649854891879138
1996	0.635557978866812
1997	0.600042102834453
1998	0.572178243761675
1999	0.548357638105024
2000	0.526150418138089
2001	0.511789506789197
2002	0.508400263857268
2003	0.529874533901609
2004	0.537589528337894
2005	0.541236630934578
2006	0.534932604849181
2007	0.512393785270586
2008	0.509113057952631
2009	0.504820208985189
2010	0.508771723149984
2011	0.516308580910131
2012	0.50258013751808
2013	0.484471729075649
2014	0.463277149268834