Year	2011 PPP (%)
1997	14.8
1998	22.8
1999	30.2
2000	28.4
2001	22.9
2002	14.7
2003	8.6
2004	9.4
2005	12.9
2006	3.1
2007	1.8
2008	2
2009	1.7
2010	1
2011	0.7
2012	0.6
2013	0.3
2014	0.1
2015	0.2
2016	0.2
2017	0.1