Year	2017 PPP (% of population)
1989	8.7
1992	7.9
1994	7.9
1996	14
1998	15.2
2000	10.7
2002	7.5
2004	7.2
2005	7.8
2006	5.4
2008	6
2010	4.7
2012	4.2
2014	4
2016	2.3
2018	1.9
2020	2.1
2022	1.2