Year	kg per PPP $ of GDP
1990	0.7901965164235824
1991	0.75955311105182
1992	0.7903729857455233
1993	0.6208743578045426
1994	0.45373418901101337
1995	0.41936281009567805
1996	0.441486890531685
1997	0.4788900162499864
1998	0.49481127176729844
1999	0.4328829547340951
2000	0.33799708217928076
2001	0.29467431552458534
2002	0.25990383246479115
2003	0.23405741013702508
2004	0.2467281245779283
2005	0.21334322621715895
2006	0.21027296700832687
2007	0.2310062399002294
2008	0.19547165447734
2009	0.14788189147610273
2010	0.13957040453863043
2011	0.1334307517627216
2012	0.14043594698917028
2013	0.13323461108003612
2014	0.1726076722935511
2015	0.19070358862753095
2016	0.21277675392427353
2017	0.2465204734091278
2018	0.2834675781855596
2019	0.2719067946284754
2020	0.2618714429423183