Year	2017 PPP (% of population)
2003	16.9
2004	10.9
2005	7.6
2006	4.6
2007	3
2008	3
2009	4
2010	5.8
2011	4.7
2012	4.1
2013	4.2
2014	4
2015	2.3
2016	1.8
2017	1.3
2018	1.1
2019	1.4
2020	1.3
2021	0.7