Year	kg per 2021 PPP $ of GDP
1990	0.283671758127453
1991	0.29454414002066215
1992	0.3026500969688632
1993	0.3186245716135705
1994	0.33916813892813724
1995	0.3411218277837166
1996	0.3295424788817996
1997	0.3342374551532811
1998	0.3068347658233526
1999	0.3039665430567598
2000	0.3001009491544479
2001	0.30637479991492605
2002	0.3036468566244286
2003	0.30704386943531353
2004	0.3027309320732428
2005	0.3126175599979252
2006	0.31106400170534615
2007	0.30466812393844733
2008	0.3042762907941848
2009	0.30690058369944545
2010	0.29748627237131975
2011	0.2963678399775744
2012	0.30320840465382365
2013	0.3082517356831884
2014	0.3085750164737116
2015	0.29958564759794687
2016	0.28674958013022045
2017	0.289476607402438
2018	0.2889954442546562
2019	0.28212447565605236
2020	0.2762175937378167