Year	kg per PPP $ of GDP
1990	0.44718964288670887
1991	0.3973463531327388
1992	0.44857995977989856
1993	0.49244561449712054
1994	0.43573224614894807
1995	0.4155762838035982
1996	0.38033713748325665
1997	0.3948681002307264
1998	0.4134742910501711
1999	0.41274063447019543
2000	0.3782858188802789
2001	0.3831544304509999
2002	0.3619187626067617
2003	0.3665761130925934
2004	0.3334593688013116
2005	0.32193314948382673
2006	0.28402432317746673
2007	0.2710470331516716
2008	0.23967284695358385
2009	0.23263623476388656
2010	0.22543773785519838
2011	0.21016435473397801
2012	0.18940972059402153
2013	0.17990443218421232
2014	0.17053661709157433
2015	0.16834800153789392
2016	0.1589994099760442
2017	0.1540856512856392
2018	0.13787964756594628
2019	0.12572145785541955
2020	0.1258017364079673