Year	kg per PPP $ of GDP
1990	2.9447439752304563
1991	2.8562884320780406
1992	2.5578440234707736
1993	2.1118306693747217
1994	2.1427553739980425
1995	1.7734587809848763
1996	1.7923701117128674
1997	1.5994538915574494
1998	1.4024387271193357
1999	1.3242865556774577
2000	1.13442233796662
2001	1.0635467099723777
2002	0.9196509846495646
2003	0.9266720047719532
2004	0.8459104175225887
2005	0.7457978189358095
2006	0.6175560976436609
2007	0.6640973502887021
2008	0.5733747915822204
2009	0.5140627506040254
2010	0.6428031453277275
2011	0.5675951823249581
2012	0.49408363150052004
2013	0.5206481082963033
2014	0.4624138245947546
2015	0.3746161507902386
2016	0.38608765682771534
2017	0.37645483970664295
2018	0.32652832115978236
2019	0.190296871931575
2020	0.1333087409875532