Year	2011 PPP (% of population)
1989	3.2
1992	18.1
1994	82.6
2006	40.2
2007	33.7
2008	27
2009	25.7
2010	28
2011	31.5
2012	31.5
2013	31.2
2014	28.5
2015	25.7