Year	$ 2017 PPP (%)
1999	1.32
2001	1.16
2002	1.19
2004	1.04
2005	1
2006	1
2007	1.4
2009	1.56
2010	1.5
2011	1.18
2012	1.05
2013	1.04
2014	1.07
2015	0.87
2016	1.13
2017	1.18
2018	1.18