Year	2011 PPP (% of population)
1981	59.8
1984	61.4
1987	61.5
1990	63
1993	67.6
1996	66.8
1999	65.3
2002	62.2
2005	55.7
2008	51.3
2010	49
2011	47.7
2012	46.1
2013	45.1
2015	45