Year	kg per 2021 PPP $ of GDP
1990	0.6380195607022894
1991	0.6308359509716499
1992	0.6023597882775071
1993	0.597716982651723
1994	0.5707918305634297
1995	0.5825571319709942
1996	0.5408604762183177
1997	0.5231847977997474
1998	0.5307913917020597
1999	0.4953552503286931
2000	0.48679020614361856
2001	0.4823983586930867
2002	0.47972559613861465
2003	0.5075542488104827
2004	0.5330013684356149
2005	0.5475488058309136
2006	0.5435398811060375
2007	0.5271135845568161
2008	0.5015457043366081
2009	0.49703404273256724
2010	0.497369116245576
2011	0.5017676820630611
2012	0.48009533524771414
2013	0.46739321179015403
2014	0.44246911726610827
2015	0.41127869707207315
2016	0.3877454575633568
2017	0.37321209154506907
2018	0.36926923824576335
2019	0.35845762165801875
2020	0.35948126972216876