Year	kg per PPP $ of GDP
1990	0.4099488574530382
1991	0.3752402291395779
1992	0.37552496977596683
1993	0.3856285058434331
1994	0.3893405605505449
1995	0.38357046227747704
1996	0.3733295494885518
1997	0.36719007285270777
1998	0.3469302748437368
1999	0.33970710501770257
2000	0.3242003903455279
2001	0.3290426496457924
2002	0.3337451002004665
2003	0.32378310266698784
2004	0.3044108127637785
2005	0.2992901749080431
2006	0.2888090715468278
2007	0.2806186636084338
2008	0.28179982395764186
2009	0.28837212287104746
2010	0.2880459081119322
2011	0.2776376857792468
2012	0.2746161249910962
2013	0.27458360471261317
2014	0.2819914662534009
2015	0.3117548488921134
2016	0.3181497041774835
2017	0.3013062746922185
2018	0.27356695472166626
2019	0.2688830489995334
2020	0.2744771409023196