Year	2017 PPP (% of population)
2004	5.8
2005	5.2
2006	2.7
2007	1.7
2008	2.4
2009	3.9
2010	3.8
2011	3.1
2012	2.8
2013	2.5
2014	1.9
2015	1.6
2016	1.5
2017	1.5
2018	0.9
2019	0.8
2020	0.8
2021	0.7