Year	2011 PPP (%)
1989	19.1
1990	20.7
1991	13.4
1992	10.8
1993	8.8
1994	10.6
1995	11.1
1996	13.3
1997	7.8
1998	13.1
1999	12.9
2001	8.9
2002	10.1
2003	12.6
2004	12.1
2005	13
2006	10.6
2007	6.5
2008	6.6
2009	4.8
2010	5.3
2011	7
2012	8
2013	6.6
2014	5.4
2015	5.6
2016	6.3
2017	6.8