Year	2017 PPP (% of population)
1992	76.1
1997	63.4
2002	65.6
2004	54.1
2006	44.6
2008	39.7
2010	14
2012	10.2
2014	8.8
2016	6.4
2018	5.3
2020	3.8
2022	4.2