Year	kg per 2021 PPP $ of GDP
1990	0.6671189784657491
1991	0.6563374055279007
1992	0.6226706734119382
1993	0.6144705103750457
1994	0.5846071536105095
1995	0.5942456597918112
1996	0.5502071718315522
1997	0.5315748504990315
1998	0.5384038742864619
1999	0.5032850000090483
2000	0.49477013914873824
2001	0.4901536910799088
2002	0.48656104367147646
2003	0.513923330817831
2004	0.538921475308499
2005	0.5531608116352263
2006	0.5486620535003618
2007	0.5307771909714879
2008	0.5053542233459991
2009	0.4995496382979088
2010	0.4994262842578489
2011	0.5029198560262022
2012	0.4812131161101404
2013	0.46796177631372154
2014	0.44313624675000973
2015	0.41168610214451695
2016	0.3882306763211805
2017	0.3744989658406772
2018	0.370329086278208
2019	0.3596046912255747
2020	0.36052688488518403