Year	2011 PPP (%)
1987	14.5
1994	15.2
1998	14.2
1999	18.6
2000	22.9
2003	12.4
2004	13.1
2005	10.4
2006	7.2
2007	7.3
2008	6.7
2009	6.3
2010	5.1
2011	4.4
2012	4.1
2013	3.1
2014	2.6
2015	3.3
2016	3.3
2017	2.9