Year	$ 2017 PPP (%)
1998	1.26
1999	1.6
2000	1.61
2001	1.28
2002	0.93
2003	0.85
2004	0.43
2005	0.87
2006	0.44
2007	0.19
2008	0.06
2009	0.09
2010	0.04
2011	0.02
2012	0.09
2013	0.03
2014	0.01
2015	0
2016	0
2017	0
2018	0.01
2019	0.11
2020	0
2021	0