Year	kg per PPP $ of GDP
1990	0.5412750046815579
1991	0.5151190066960459
1992	0.5078180250905688
1993	0.5107989889916827
1994	0.5062508613103754
1995	0.49754002903436007
1996	0.48070269323186715
1997	0.4740072768192618
1998	0.47215909804483364
1999	0.4347914258068127
2000	0.4163815704330755
2001	0.4333734038350844
2002	0.4223741306071093
2003	0.42277017858291155
2004	0.4179487067637197
2005	0.38238400046234433
2006	0.35302181389513626
2007	0.3365580344762218
2008	0.33748933258783004
2009	0.3215571263272123
2010	0.31887814129456277
2011	0.2963382722687789
2012	0.308170140267711
2013	0.3000034082192523
2014	0.29182606261019184
2015	0.27422857861133326
2016	0.26178501993496256
2017	0.256514456032433
2018	0.249352359092883
2019	0.24191607277141214
2020	0.2169205570341619