Year	2017 PPP (% of population)
1992	16.3
1993	13.8
1995	24.8
1996	28
2002	17
2003	10.4
2004	8.3
2005	3.9
2006	2.7
2007	2.1
2008	0.9
2009	1
2010	0.4
2011	0.5
2012	0.4
2013	0.3
2014	0.2
2015	0.9
2016	0.7
2017	0.6
2018	0.5
2019	0.3
2020	0.2