Year	2017 PPP (% of population)
2004	1
2005	0.9
2006	0.8
2007	1
2008	1.1
2009	1.1
2010	1.2
2011	0.9
2012	1.1
2013	1.2
2014	1.8
2015	1.2
2016	2.1
2017	1.3
2018	1.3
2019	0.5
2020	0.4
2021	0.7