Year	2017 PPP (% of population)
2003	4
2004	3.3
2005	3.3
2006	3
2007	2.2
2008	2.9
2009	2.3
2010	2.6
2011	3.7
2012	5.5
2013	5.4
2014	4.7
2015	3.6
2016	3.6
2017	2.3
2018	2.1
2019	1.5
2020	2.6
2021	1.7