Year	2011 PPP (% of population)
1996	24.6
2001	32.3
2002	27.9
2003	22.8
2004	16.5
2005	24.2
2006	6
2007	2.9
2008	2.2
2009	2.6
2010	1.9
2011	0.7
2012	0.5
2013	0.3
2014	0.3
2015	0.4
2016	0.7
2017	0.4