Year	kg per PPP $ of GDP
1990	0.2439160481420324
1991	0.2280640159364723
1992	0.21577392964325096
1993	0.22719384644894988
1994	0.22492593068078084
1995	0.2366864773065394
1996	0.23716759566993645
1997	0.2513206416974568
1998	0.26162569238259475
1999	0.25130523203569693
2000	0.2538934556590719
2001	0.25900305512522576
2002	0.28120897111253
2003	0.27506742312401633
2004	0.29879542117823255
2005	0.2925549846434317
2006	0.27247446147232296
2007	0.27443330673554245
2008	0.28498761516462795
2009	0.3023419050487914
2010	0.32125753403239127
2011	0.3047016541415135
2012	0.2724696573822889
2013	0.26840293985103986
2014	0.2701130019921947
2015	0.28298407486224636
2016	0.2820467429165192
2017	0.2633951237859391
2018	0.2970305740967197
2019	0.3188382060858331
2020	0.31206126899975145