Year	2011 PPP (%)
1981	62
1984	63.2
1987	63.3
1990	64.8
1993	67.5
1996	66.8
1999	66.2
2002	64.8
2005	61.1
2008	58.2
2010	56.7
2011	56.3
2012	55.5
2013	55.1
2015	55.2