Year	2017 PPP (% of population)
1996	6.8
1997	18.8
1998	17
1999	21.8
2000	22.9
2001	23
2002	12.7
2003	12.9
2004	12.4
2005	12.9
2006	12.6
2007	14.2
2008	12.4
2009	12.1
2010	14.4
2011	13.4
2012	10.7
2013	8.1
2014	6.1
2015	4.9
2016	4.9
2017	6.2
2018	5.6
2019	4.8
2020	5.8
2021	5.5