Year	$ 2017 PPP (%)
2002	3.91
2003	3.12
2004	1.09
2005	0.83
2006	0.28
2007	0.16
2008	0.09
2009	0.11
2010	0
2011	0
2012	0.01
2013	0
2014	0
2015	0
2016	0
2020	0