Year	2017 PPP (%)
1998	19.8
1999	17.7
2000	13.7
2001	7.6
2002	5.7
2003	4.7
2004	2.3
2005	1.3
2006	0.7
2007	0.5
2008	0.3
2009	0.3
2010	0.1
2011	0.1
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0