Year	$ 2017 PPP (%)
1997	1.8
1998	1.91
1999	2.12
2000	2.8
2001	3.13
2002	3.22
2003	2.41
2004	2.73
2005	3.21
2006	4.35
2007	4.18
2008	4.67
2009	5.68
2010	4.98
2011	4.79
2012	4.74
2013	4.49
2015	4.64
2016	4.51
2017	4.43
2018	4.06
2019	4.18
2020	4.49
2021	4.27