Year	2017 PPP (% of population)
2004	5.7
2005	7.4
2006	4
2007	4
2008	3.3
2009	4
2010	5.4
2011	5.8
2012	7.8
2013	7.3
2014	5.4
2015	3.9
2016	3.3
2017	4
2018	2.8
2019	2.5
2020	2.5
2021	2.2