Year	kg per PPP $ of GDP
1990	0.8164569812349883
1991	0.7645006083238057
1992	0.6896454985193116
1993	0.6302564531044506
1994	0.6001227007530342
1995	0.5512251459116966
1996	0.49439588315624916
1997	0.4503585959722797
1998	0.42557369438899456
1999	0.4255152293813364
2000	0.4205682642092719
2001	0.4062720155769931
2002	0.378013430211022
2003	0.3687700702497468
2004	0.3503882193018352
2005	0.35162158339485916
2006	0.3362524757121226
2007	0.3007279555510235
2008	0.29852806301015167
2009	0.2656503546950249
2010	0.24515451141788805
2011	0.21978742869824452
2012	0.2108221488680465
2013	0.17847482311540322
2014	0.16583976649384058
2015	0.13996557697983678
2016	0.13301783077489857
2017	0.15120380090590835
2018	0.14542950923188416
2019	0.14145716077785506
2020	0.1303133126845073