Year	kg per 2021 PPP $ of GDP
1990	0.4146235193516377
1991	0.4113195467716867
1992	0.4051226210937084
1993	0.4090146063725005
1994	0.4041539150042919
1995	0.4111290069732614
1996	0.39214401903630935
1997	0.38397341000534496
1998	0.38388270887443465
1999	0.3710842416583185
2000	0.36779386966603034
2001	0.36779553349600547
2002	0.36899371399686215
2003	0.38510178877029
2004	0.3994438696514566
2005	0.4091618974172106
2006	0.4088817645973476
2007	0.4037760575193208
2008	0.3913256018275594
2009	0.39527096992071287
2010	0.3973487719311208
2011	0.4046779890166528
2012	0.39316939206794277
2013	0.38506792189695266
2014	0.36746582537345845
2015	0.34642484193943646
2016	0.3308509078879738
2017	0.3213150868963763
2018	0.31811459784855767
2019	0.31039912631196925
2020	0.3109200065384504