Year	2011 PPP (% of population)
1986	28.4
1989	54.7
1992	40.7
1996	32
1997	29.6
2000	30.2
2001	30.1
2002	30.6
2003	38.5
2004	45.7
2005	36.8
2006	33.6
2007	33.3
2008	34.4
2009	31.7
2010	31.7
2011	31
2012	30.7
2013	29.8
2014	25.1
2015	21.7
2016	19.9