Year	2017 PPP (%)
1997	16.4
1998	15.9
1999	16.1
2000	15.5
2001	16.4
2002	14.6
2003	12.7
2004	13.5
2005	14.9
2006	12.9
2007	10.9
2008	9
2009	7.7
2010	6.3
2011	5.8
2012	5.3
2013	4.8
2014	4.4
2015	4.4
2016	4.2
2017	4.1
2018	3.4
2019	3
2020	5.8
2021	2.9
2022	2.8