Year	2017 PPP (% of population)
1987	0.5
1992	0.5
1995	0
2000	0
2003	0.3
2004	0.3
2005	0.3
2006	0.1
2007	0
2008	0.1
2009	0.5
2010	0.1
2011	0
2012	0
2013	0.3
2014	0.2
2015	0.2
2016	0.3
2017	0.1
2018	0.2
2019	0.3
2020	0.2
2021	0.2