Year	2017 PPP (% of population)
1986	6.9
1989	17.5
1992	7.6
1996	6.5
1997	6.9
2000	6.7
2001	5.1
2002	7.6
2003	8.7
2004	11.6
2005	7.4
2006	6.3
2007	6.1
2008	5.4
2009	4.7
2010	3.9
2011	4.1
2012	3.8
2013	3
2014	3.4
2015	2.5
2016	2
2017	1
2018	0.8
2019	0.8
2020	1
2021	0.9
2022	0.8