Year	kg per 2021 PPP $ of GDP
1990	0.5234097619696506
1991	0.5213311228238425
1992	0.5073322108241448
1993	0.49261221941775274
1994	0.4721422873003815
1995	0.47786278467260324
1996	0.4556861760576245
1997	0.4358279630349065
1998	0.4335642435080877
1999	0.41646645178506336
2000	0.4116853214671913
2001	0.41192829444159285
2002	0.4097990994943805
2003	0.4262899931303464
2004	0.432337798046383
2005	0.43717068942753323
2006	0.43412253198955797
2007	0.4234562853198546
2008	0.4115149076039215
2009	0.41084437080414815
2010	0.41155769969148875
2011	0.41526379929628493
2012	0.403763180098739
2013	0.39491991439671836
2014	0.3794043628946991
2015	0.3598227125040999
2016	0.3443722444559731
2017	0.3352166326611585
2018	0.3323162801922753
2019	0.3255188439608118
2020	0.3257673100530371