Year	2017 PPP (% of population)
2004	2.5
2005	2.4
2006	1.6
2007	0.6
2008	1.3
2009	1.7
2010	1.7
2011	1
2012	1.1
2013	1.2
2014	0.8
2015	0.7
2016	0.6
2017	0.8
2018	0.4
2019	0.2
2020	0.5
2021	0.4