Year	$ 2017 PPP (%)
1999	15.67
2001	12.31
2002	12.54
2003	10.72
2004	10.38
2005	6.33
2006	3.54
2007	3.87
2008	2.06
2009	4.09
2010	6.78
2011	6.96
2012	5
2013	4.51
2014	4.38
2015	4.11
2016	5.12
2017	6.41
2019	6.15
2020	15.95
2021	4.39