Year	kg per 2021 PPP $ of GDP
1990	0.6100688542230767
1991	0.6104406293914465
1992	0.58674060316923
1993	0.5585873740094761
1994	0.5554853702891193
1995	0.532683522195713
1996	0.5411660966853659
1997	0.553306193129852
1998	0.5490896619096627
1999	0.5496165283195364
2000	0.5144988812497354
2001	0.5179856791703732
2002	0.5188638658864759
2003	0.5382691294794485
2004	0.536015808157202
2005	0.534406802154611
2006	0.5450171182804336
2007	0.5505378937820985
2008	0.5447848003269936
2009	0.5414020709235887
2010	0.5682031337199338
2011	0.5797849855795176
2012	0.582481050867554
2013	0.5921644716815966
2014	0.5997380080001039
2015	0.5783216038645044
2016	0.5662380899284252
2017	0.5473584286058482
2018	0.5314042032034375
2019	0.5082455371335859
2020	0.5092904822956833