Year	2017 PPP (% of population)
1985	0.2
1986	0.2
1987	0.2
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0.2
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0.5
2004	0.1
2005	0.1
2006	0
2007	0
2008	0.1
2009	0.2
2010	0.3
2011	0.2
2012	0.3
2013	0.3
2014	0.3
2015	0.7
2016	0.5
2017	0.9
2018	0.7
2019	0.3
2020	0
2021	0.3