Year	kg per PPP $ of GDP
1990	0.9170942322191471
1991	0.9297485944536011
1992	1.087947633121799
1993	0.941011399975791
1994	0.7839764573903116
1995	0.656591438119082
1996	0.6314039079450814
1997	0.540464484846508
1998	0.4774166253093486
1999	0.42640729639487857
2000	0.36401860550135473
2001	0.3479426392326455
2002	0.3156900751751798
2003	0.30002594143020017
2004	0.2740841609725682
2005	0.24767002872141397
2006	0.23307338403727118
2007	0.2125754060150892
2008	0.19020217255779936
2009	0.20198710076332602
2010	0.22938240161698542
2011	0.1991942626787102
2012	0.1747958378623323
2013	0.16355666886602976
2014	0.15336604245646349
2015	0.14814174936267216
2016	0.13645853266861435
2017	0.12778839381950327
2018	0.13083175243527798
2019	0.1187873247420773
2020	0.10807236623490649