Year	kg per PPP $ of GDP
1990	0.3912721977205529
1991	0.36872667726638697
1992	0.34415578829453247
1993	0.29200999777258435
1994	0.23103389160850593
1995	0.27905696645953815
1996	0.3159443147300392
1997	0.32222736274659486
1998	0.36448283107331797
1999	0.3771191052728396
2000	0.37612401582509924
2001	0.3459300546320765
2002	0.2114773229872781
2003	0.240778916025473
2004	0.2469443943461124
2005	0.27270290505578976
2006	0.2713755204472473
2007	0.24578773402440887
2008	0.2383058504945748
2009	0.23541052841063445
2010	0.2371428568210517
2011	0.22568370411309474
2012	0.18318681049692842
2013	0.1874532484488143
2014	0.1814065536427242
2015	0.23527425411489436
2016	0.2621154878435756
2017	0.22733166669336474
2018	0.20271525367742427
2019	0.21808836323909547
2020	0.26065019772815007