Year	kg per 2011 PPP $ of GDP
1992	0.383704226578459
1993	0.393597725422111
1994	0.378685871419806
1995	0.392741942868262
1996	0.393889466130939
1997	0.397421284040025
1998	0.36858701761254
1999	0.35113453455971
2000	0.318545063671327
2001	0.325891042556838
2002	0.319163841212706
2003	0.312188704885983
2004	0.30369590262963
2005	0.294250961140521
2006	0.285128454158183
2007	0.266620597031477
2008	0.275756403037209
2009	0.263310908997138
2010	0.261027864624297
2011	0.25518881433146
2012	0.256836063194226
2013	0.248692379336813
2014	0.218716659617033