Year	kg per PPP $ of GDP
1990	0.7922794353435936
1991	0.7609370786766956
1992	0.7241106808595743
1993	0.6798714185353325
1994	0.6324253212036013
1995	0.6037026660799235
1996	0.5848536678540015
1997	0.5410702845397664
1998	0.5292704205868385
1999	0.5043847469268139
2000	0.47348339635430287
2001	0.4541219953916549
2002	0.43332243454777525
2003	0.4296632142549026
2004	0.40377795839443986
2005	0.38189852321832485
2006	0.34999475097918403
2007	0.32536727307848967
2008	0.30110197141622286
2009	0.28540814781626567
2010	0.283053930410082
2011	0.26704047380848506
2012	0.25609087785392576
2013	0.238827076495023
2014	0.22173880560314763
2015	0.2165778317073474
2016	0.20706405283268625
2017	0.1981031490787581
2018	0.18830970902602026
2019	0.170928523727134
2020	0.1617207792550997