Year	kg per 2021 PPP $ of GDP
1990	0.4953111272016337
1991	0.4944283126976721
1992	0.4781187111259738
1993	0.4631763079931887
1994	0.44231397174900583
1995	0.4442339744841662
1996	0.42348738303365735
1997	0.4088904779340635
1998	0.4030992021497127
1999	0.3898065809313686
2000	0.38545548962789794
2001	0.3838164387779205
2002	0.38111381189251525
2003	0.39053436898545024
2004	0.3932043112352777
2005	0.39426810581668553
2006	0.39072436376375036
2007	0.38338732321077373
2008	0.3748146041747785
2009	0.37175220503631634
2010	0.37116333435398136
2011	0.37414516736606174
2012	0.36596030230036336
2013	0.35765259069019534
2014	0.3457950958443776
2015	0.3274425210714899
2016	0.3142111914168245
2017	0.30655003406283626
2018	0.3039156973432949
2019	0.2964236352664851
2020	0.2954098542708699