Year	$ 2017 PPP (%)
1999	4.81
2001	4.79
2002	3.37
2003	3.23
2004	2.55
2005	1.79
2006	1.53
2007	0.97
2008	0.78
2009	1.6
2010	2.82
2011	2.03
2012	2.04
2013	2.05
2014	2.69
2015	1.98
2016	2.48
2017	3.26
2019	3.66
2020	2.94
2021	1.92