Year	2017 PPP (% of population)
1987	1.2
1992	1
1995	0.2
2000	0.2
2003	0.4
2004	0.4
2005	0.5
2006	0.3
2007	0.6
2008	0.8
2009	1
2010	0.2
2011	0.6
2012	0.4
2013	0.6
2014	0.7
2015	0.4
2016	0.5
2017	0.3
2018	0.3
2019	0.4
2020	0.4
2021	0.3