Year	kg per PPP $ of GDP
1990	0.4685024334435903
1991	0.4438413292803314
1992	0.447994570331463
1993	0.4500063581119889
1994	0.5049506702249398
1995	0.491717474328844
1996	0.4679101445847304
1997	0.4742643206026981
1998	0.4572354547153424
1999	0.4911604140738692
2000	0.4777463830880226
2001	0.47455447797922173
2002	0.4516657738094291
2003	0.42963518121447725
2004	0.42968042286100805
2005	0.4357699278080019
2006	0.4324187369362455
2007	0.41335473983352905
2008	0.41153318516550247
2009	0.4198332212780816
2010	0.3912468023577592
2011	0.3809655413960607
2012	0.43150771579741687
2013	0.4667346212963653
2014	0.4820514871595292
2015	0.5297627855149815
2016	0.4971385892557761
2017	0.4888715772465013
2018	0.49879237036766394
2019	0.538081643422127
2020	0.4981082746322