Year	2011 PPP (% of population)
1993	25.5
2003	13.5
2004	9.2
2005	6
2006	3.7
2007	2.5
2008	2.2
2009	3.2
2010	4.2
2011	3.7
2012	3.7
2013	3.7
2014	3.2
2015	2