Year	kg per 2021 PPP $ of GDP
1990	0.5201484731289187
1991	0.5366391371152551
1992	0.5657387271638211
1993	0.5568429402299196
1994	0.5588479031805305
1995	0.5540884710760354
1996	0.543917733815198
1997	0.5055581003152178
1998	0.5057273643885248
1999	0.4869398838684798
2000	0.4612485184823664
2001	0.444523736481329
2002	0.42706775273333286
2003	0.417447705052877
2004	0.3864258598865507
2005	0.364805010818452
2006	0.35168450647207916
2007	0.33144896640098687
2008	0.3199266658117824
2009	0.3134246504730773
2010	0.31457101109897323
2011	0.3128952227102591
2012	0.29869181791570387
2013	0.2843712767466735
2014	0.27115040069385693
2015	0.26454525634956744
2016	0.2639728820184184
2017	0.26057234862650414
2018	0.2577887196412689
2019	0.2504293518571956
2020	0.2465797496195567