Year	$ 2017 PPP (%)
1998	9.45
1999	11.8
2000	12.19
2001	12.05
2002	11.34
2003	9.21
2004	7.25
2005	10.4
2006	6.89
2007	3.39
2008	4.07
2009	3.54
2010	3.2
2011	1.7
2012	1.43
2013	1.18
2014	0.71
2015	0.79
2016	0.61
2017	0.46
2018	0.25
2019	0.85
2020	0.77
2021	0.52