Year	2017 PPP (% of population)
1996	29.3
2001	37.6
2002	33.4
2003	28
2004	21.6
2005	28.4
2006	8.4
2007	4.5
2008	3.4
2009	4
2010	2.9
2011	1.1
2012	0.9
2013	0.4
2014	0.5
2015	0.7
2016	1.3
2017	0.7
2018	0.5
2019	0.5
2020	0.4
2021	0.3