Year	$ 2017 PPP (%)
2001	0.37
2002	0.43
2003	0.46
2004	0.83
2005	0.4
2006	0.58
2007	0.47
2008	0.35
2009	0.38
2010	0.56
2011	0.76
2012	0.71
2013	0.25
2015	0.2
2017	0.27
2018	0.2