Year	2017 PPP (% of population)
2004	2.2
2005	0.9
2006	0.7
2007	0.5
2008	0.2
2009	0.4
2010	0.3
2011	0.3
2012	0.2
2013	0.4
2014	0.4
2015	0.4
2016	0.2
2017	0.3
2018	0.2
2019	0.1
2020	0.1
2021	0.1