Year	kg per 2021 PPP $ of GDP
1990	0.8658229878038015
1991	0.8713284572577122
1992	0.880358634351283
1993	0.8034985325196671
1994	0.7349594351486599
1995	0.72888286926286
1996	0.7295641630285269
1997	0.7256668257839621
1998	0.7377842553056211
1999	0.7236197141289225
2000	0.6933809379790762
2001	0.71980645652817
2002	0.7225903697655062
2003	0.7812995757287688
2004	0.7733017724024536
2005	0.7827550552332878
2006	0.8231322610705254
2007	0.8062738559566185
2008	0.7463886722392427
2009	0.7082541966415627
2010	0.742393651545194
2011	0.7500811135768091
2012	0.7217380551843942
2013	0.7398848520278691
2014	0.7202268854054494
2015	0.7043283941683774
2016	0.6659652801839115
2017	0.6375959113307529
2018	0.6422416696157515
2019	0.6292611494477921
2020	0.5845746005732696