Year	2017 PPP (% of population)
1996	65.6
2001	74.5
2002	72.3
2003	67.6
2004	64.3
2005	61.5
2006	50.8
2007	38
2008	36.7
2009	37.6
2010	32
2011	19.2
2012	19
2013	13.7
2014	14.8
2015	17.2
2016	23.8
2017	18.8
2018	14.3
2019	14.4
2020	13.9
2021	10.6