Year	$ 2017 PPP (%)
1998	1.1
1999	1.28
2000	1.48
2001	1.08
2002	1.11
2003	1.11
2004	1
2005	0.97
2006	0.81
2007	0.65
2008	0.33
2009	0.34
2010	0.41
2011	0.4
2012	0.23
2013	0.23
2016	0.59