Year	2011 PPP (% of population)
1993	30.4
1995	22.1
1996	23.6
2004	15.2
2005	14
2006	7.7
2007	5
2008	6.2
2009	9.5
2010	9.5
2011	8.7
2012	7.5
2013	6
2014	5.5
2015	4