Year	2017 PPP (%)
1981	5.8
1988	3.7
1990	2.5
1992	1.7
1994	0.8
1996	0.5
1998	0.4
1999	0.6
2000	0.6
2002	0.3
2004	0.2
2006	0.2
2007	0.1
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0