Year	$ 2017 PPP (%)
1999	24.77
2001	38.56
2002	30.67
2004	30.56
2005	28.02
2006	23.71
2007	20.99
2009	10.76
2010	8.5
2011	6.7
2012	5.97
2013	7.53
2014	7.5
2015	5.18
2016	8.13
2017	7.7
2018	3.31