Year	kg per PPP $ of GDP
1990	2.159597324973463
1991	2.1138466516910515
1992	2.219315989488302
1993	2.248716453462723
1994	2.2066210828043986
1995	1.9661586585151123
1996	1.9264981295134944
1997	1.8206883524567286
1998	1.9923805123210185
1999	1.8872243458294296
2000	1.8888904919862741
2001	1.8005378922548037
2002	1.7621070359557067
2003	1.5559397920492857
2004	1.4440964734206005
2005	1.2499524108640176
2006	1.205793799489979
2007	1.0321805596129163
2008	0.9765682499500816
2009	0.8121782977147105
2010	0.8078971439375919
2011	0.7501244422956487
2012	0.6268452206457721
2013	0.5868275357376189
2014	0.524974216745401
2015	0.47521065547485686
2016	0.48660455550660847
2017	0.4951615690005885
2018	0.47553983300031466
2019	0.466436488588234
2020	0.4492026222400919