Year	$ 2017 PPP (%)
2002	21.06
2003	18.09
2004	9.97
2005	5.74
2006	3.34
2007	1.86
2008	1.13
2009	1.68
2010	0.35
2011	0.28
2012	0.09
2013	0.06
2014	0
2015	0.12
2016	0.01
2020	0.07