Year	kg per PPP $ of GDP
1990	0.9111702307027689
1991	0.9243354329194982
1992	1.0024421914167028
1993	0.8959033322402277
1994	0.7505741985555523
1995	0.7120683306912736
1996	0.6081819773728012
1997	0.5416793357228729
1998	0.5299388139056825
1999	0.5921803769435812
2000	0.5127784774129226
2001	0.4931498945529116
2002	0.4837436142437786
2003	0.4696905502978091
2004	0.46487681668888614
2005	0.516774315021126
2006	0.4863074140494254
2007	0.48955123206502466
2008	0.46120590128245864
2009	0.4018248886003876
2010	0.4108476271005439
2011	0.41907491630347987
2012	0.38087354615077235
2013	0.3521884779850622
2014	0.3310766793539147
2015	0.3145880351370037
2016	0.25591876867943814
2017	0.27221885448576083
2018	0.28163266076617643
2019	0.24463623527842046
2020	0.19048755987366353