Year	2017 PPP (%)
1999	38.5
2001	40.5
2002	38.2
2003	36
2004	29.2
2005	23.8
2006	20.7
2007	17.6
2008	15.5
2009	19.2
2010	19.6
2011	18.4
2012	17
2013	16.5
2014	16.1
2015	14.2
2016	13.7
2017	13.8
2018	14.4
2019	15.2
2020	14.1
2021	14.4
2022	15