Year	2011 PPP (%)
1981	5
1988	2.6
1990	1.8
1992	1.1
1994	0.5
1996	0.3
1998	0.2
1999	0.4
2000	0.4
2002	0.2
2004	0.1
2006	0.1
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0