Year	2011 PPP (%)
1998	11.6
2000	11.2
2001	9.2
2002	8.7
2003	6.2
2004	2.8
2005	3
2006	1.8
2007	2
2008	0.7
2009	0.3
2010	1.1
2011	0.2
2012	0.7
2013	0.5
2014	0.2
2015	0.5
2016	0.2
2017	0.3