Year	2011 PPP (%)
1981	21.6
1984	22.6
1987	22.4
1990	23.1
1993	23.7
1996	22
1999	21.3
2002	19.3
2005	16.1
2008	14.1
2010	13.2
2011	12.6
2012	12
2013	11.5
2015	11.1