Year	2017 PPP (% of population)
1992	3.9
1993	1.9
1995	7.1
1996	7.2
2002	2.7
2003	1.1
2004	0.9
2005	0.4
2006	0.2
2007	0.1
2008	0
2009	0.1
2010	0
2011	0
2012	0.1
2013	0
2014	0
2015	0.1
2016	0.1
2017	0
2018	0
2019	0
2020	0