Year	2011 PPP (% of population)
1987	2.4
1994	3.2
2002	2.5
2003	4.2
2004	2.2
2005	2.6
2006	1.9
2007	1.4
2008	0.6
2009	0.9
2010	0.8
2011	0.3
2012	0.3
2013	0.3
2014	0.3
2015	0.3
2016	0.2