Year	2017 PPP (% of population)
2009	0.9
2010	1.2
2011	0.6
2012	0.8
2013	0.7
2014	1
2015	0.6
2016	0.6
2017	0.5
2018	0.4
2019	0.3
2020	0.3
2021	0.3