Year	2017 PPP (%)
1971	2.1
1973	1.5
1975	1.4
1977	1.2
1979	1.1
1981	0.8
1982	0.6
1984	0.7
1985	0.6
1986	1
1987	0.5
1988	0.6
1989	1.2
1990	1.1
1991	1.2
1992	0.7
1993	1.2
1994	0.8
1995	0.7
1996	0.3
1997	0.3
1998	0.3
1999	0.3
2000	0.2
2001	0.2
2002	0.2
2003	0.2
2004	0.2
2005	0.2
2006	0.2
2007	0.2
2008	0.2
2009	0.2
2010	0.2
2011	0.2
2012	0.2
2013	0.3
2014	0.2
2015	0.3
2016	0.2
2017	0.2
2018	0.2
2019	0.2