Year	2017 PPP (% of population)
2004	8.3
2005	5.2
2006	3.5
2007	3.2
2008	3.9
2009	3.9
2010	3.4
2011	3
2012	4.5
2013	4.1
2014	4.8
2015	4.3
2016	4.3
2017	2.7
2018	3.4
2019	2
2020	1.9
2021	2.4