Year	2011 PPP (%)
1990	6.7
1997	16.4
1999	22.1
2000	24.9
2001	19.5
2002	20.8
2004	12.3
2005	16.4
2006	13.9
2007	11.3
2008	9.3
2009	8.8
2011	6.1
2012	6.9
2013	5.7
2014	5.2
2015	5.3
2016	5.7
2017	4.9