Year	kg per PPP $ of GDP
1990	0.2541596149133134
1991	0.25909090139295476
1992	2.3354704853138712
1993	2.2200913818196106
1994	2.0084210478353812
1995	1.7803817414798075
1996	1.150956045070048
1997	0.6237153554830944
1998	0.6057747025656839
1999	0.766082582386854
2000	0.37985235079687646
2001	0.3317911245796562
2002	0.24047963274224982
2003	0.2274310977960311
2004	0.3167905816270381
2005	0.2674958972635175
2006	0.23983492005214388
2007	0.22946015936496195
2008	0.17569776097445072
2009	0.17971247549733005
2010	0.19436446289729642
2011	0.1799934072839711
2012	0.15118269978701854
2013	0.1594259815194901
2014	0.15631051525485637
2015	0.19400059695492355
2016	0.2321777163611709
2017	0.18641841363004175
2018	0.17029311608807654
2019	0.17747770916897426
2020	0.18531011282128382