Year	$ 2017 PPP (%)
1997	1.57
1998	1.1
1999	1.65
2000	2.1
2001	2.73
2002	1.57
2003	1.48
2004	1.27
2005	1.95
2006	1.79
2007	2.36
2008	2.72
2009	3.23
2010	2.81
2011	2.69
2012	2.61
2013	2.14
2015	1.5
2016	1.5
2017	2.03
2018	1.56
2019	1.33
2020	1.57
2021	1.55