Year	2011 PPP (% of population)
1981	90.3
1984	90.9
1987	91.4
1990	92.7
1993	93.9
1996	93.3
1999	93.4
2002	93
2005	92
2008	90.6
2010	89.6
2011	89.8
2012	90
2013	90
2015	90.2