Year	kg per 2021 PPP $ of GDP
1990	0.5864493208389732
1991	0.5849999398827268
1992	0.5510208124212195
1993	0.5325722297354047
1994	0.5443349042163792
1995	0.5167644986849653
1996	0.5273627864536236
1997	0.5421009587120725
1998	0.5338809579035194
1999	0.5384287643041916
2000	0.49885405226146856
2001	0.49717037546595183
2002	0.49898771038832257
2003	0.5111806581061605
2004	0.5095980210561493
2005	0.507179023766408
2006	0.5122201241761585
2007	0.5221853425479515
2008	0.5276368921896298
2009	0.5304618221888592
2010	0.5569524565377554
2011	0.5706020512756848
2012	0.5790103602032645
2013	0.5881574702684833
2014	0.6014404582630689
2015	0.5790441292235787
2016	0.5717985900037753
2017	0.5537154956729041
2018	0.5334052102869616
2019	0.5070918893958573
2020	0.5155389108329331