Year	2011 PPP (% of population)
1996	56.6
2001	64.9
2002	62
2003	56.3
2004	51.9
2005	51.7
2006	35.2
2007	24
2008	22
2009	22.7
2010	18.2
2011	9.1
2012	9.2
2013	5.8
2014	6.7
2015	8.1
2016	12.2
2017	8.6