Year	$ 2017 PPP (%)
1999	5.24
2001	4.84
2002	4.04
2003	2.83
2004	1.83
2005	0.98
2006	0.91
2007	0.61
2008	0.25
2009	0.4
2010	0.96
2011	1.01
2012	0.57
2013	0.94
2014	0.77
2015	0.65
2016	0.96
2017	1.64
2019	1.8
2020	8.12
2021	0.59