Year	kg per PPP $ of GDP
1990	0.5619960743915671
1991	0.24749864994851842
1992	0.38992890749515413
1993	0.3792156523302158
1994	0.4084378016290107
1995	0.3771152324952814
1996	0.36181059266879934
1997	0.36343843666256
1998	0.3915628142813524
1999	0.4267971563588065
2000	0.43433062777275927
2001	0.452357175550545
2002	0.45195214303075043
2003	0.3949258799575717
2004	0.37164933468227457
2005	0.3678433115097033
2006	0.3438958597849078
2007	0.30787978882698397
2008	0.3166594428611873
2009	0.34675310833833556
2010	0.36478731980037976
2011	0.3363835244247468
2012	0.31143808008839646
2013	0.32423442626112986
2014	0.34160235025962404
2015	0.5128544006049217
2016	0.5451384744199024
2017	0.4671410739120467
2018	0.41849942505634213
2019	0.42321955668777
2020	0.5225851558401579