Year	kg per PPP $ of GDP
1990	0.3747036504601589
1991	0.31577503236404986
1992	0.2900477405336534
1993	0.3418950091612849
1994	0.4149276486849079
1995	0.46768145827059593
1996	0.4698165982489536
1997	0.40772034998865525
1998	0.41504255105761595
1999	0.4190100510794499
2000	0.4089188385715582
2001	0.40465100026512296
2002	0.41262606834974025
2003	0.38422588794041196
2004	0.3547978851150753
2005	0.3362806401710646
2006	0.3058829373843214
2007	0.26162591305365585
2008	0.2772940166480799
2009	0.3052053366501468
2010	0.30316977227450176
2011	0.41683165821182955
2012	0.3517893396160049
2013	0.44820134830067254
2014	0.526835556469925
2015	0.4389501892654786
2016	0.4328903556047185
2017	0.42886087068693013
2018	0.41838988688470463
2019	0.4668145152652726
2020	0.41094915670169835