Year	2011 PPP (% of population)
1990	98.3
1993	96.3
1996	92.3
1999	88.9
2002	80.6
2005	70.5
2008	60.6
2010	53.4
2011	49.2
2012	44.3
2013	36.3
2014	31.5
2015	27.2