Year	2011 PPP (% of population)
1985	4.3
1987	4.2
1989	1.1
2004	13.2
2005	9.5
2006	6.7
2007	4.2
2008	3.2
2009	3.2
2010	3
2011	3
2012	3
2013	3
2014	2.7
2015	2.7