Year	kg per PPP $ of GDP
1990	0.43222464274084516
1991	0.41760873158018996
1992	0.4023483898704972
1993	0.3981420337713567
1994	0.39620092870515744
1995	0.3915965675147239
1996	0.3819979419218428
1997	0.3772539812585568
1998	0.3849282000230916
1999	0.38234759543395114
2000	0.370569049776347
2001	0.36413886749378505
2002	0.3622277315784684
2003	0.3508654525656189
2004	0.33759393670529736
2005	0.3217464161928204
2006	0.308227566238208
2007	0.2996428030160829
2008	0.29277775988807214
2009	0.2930458805992376
2010	0.2850586519629365
2011	0.2753291390453855
2012	0.2709463821413084
2013	0.26231449614210883
2014	0.2641612042888683
2015	0.2593065603017823
2016	0.25056576276527426
2017	0.2443623603480923
2018	0.23376440991363676
2019	0.2223294937632071
2020	0.20867396671054306