Year	kg per PPP $ of GDP
1990	1.1269508628121856
1991	1.3488780856141651
1992	1.500268898051562
1993	1.658751212451187
1994	1.6436490809062874
1995	1.7013453375133436
1996	1.78539525151313
1997	1.93339563618207
1998	2.1060210025279242
1999	2.08635937388565
2000	2.0636834295952196
2001	1.9825649939774508
2002	2.0985014542078337
2003	1.8073657418007243
2004	1.7135642430104265
2005	1.7606164919818905
2006	1.317231675648445
2007	1.2657463333456802
2008	0.7207792971674346
2009	0.7244300679515466
2010	0.7564789854390892
2011	0.6068185944278758
2012	0.50292887363033
2013	0.5335891528086184
2014	0.4843209330728743
2015	0.49976733346241126
2016	0.45971544321277996
2017	0.5124441046675614
2018	0.4872046460672751
2019	0.43652778804245185
2020	0.3288419067687488