Year	kg per PPP $ of GDP
1990	0.36431449886668743
1991	0.34788759586834694
1992	0.3174631442369898
1993	0.3141307955628747
1994	0.30489776701923377
1995	0.28112035555853604
1996	0.2842488632561005
1997	0.2921383897936546
1998	0.2946972559574972
1999	0.30206806247896717
2000	0.3555991941777862
2001	0.39452367496657065
2002	0.4188646381719245
2003	0.4025154485641617
2004	0.3875613391218895
2005	0.3602943699216576
2006	0.34621824244943844
2007	0.33562573721581657
2008	0.31936945838002395
2009	0.3184072227247785
2010	0.2947419426708531
2011	0.27908400638970626
2012	0.26716282201400177
2013	0.2730633254628494
2014	0.23230204318550848
2015	0.20205350475675762
2016	0.1858773737605872
2017	0.17531667130005146
2018	0.17014591453709815
2019	0.1665930335618201
2020	0.12467256367096996