Year	2017 PPP (%)
1989	17.7
1990	19.3
1991	12.2
1992	9.7
1993	8
1994	9.7
1995	10.1
1996	12.3
1997	7
1998	12.3
1999	12.1
2001	8.2
2002	9.3
2003	11.7
2004	11.2
2005	12.2
2006	9.9
2007	5.9
2008	6
2009	4.2
2010	4.7
2011	5.5
2012	6.8
2013	5.2
2014	4.3
2015	4.3
2016	5.5
2017	5
2018	5.1
2019	4.3