Year 2011 PPP (% of population) 2003 0.2 2004 0 2005 0.2 2006 0 2007 0.5 2008 0.5 2009 0.5 2010 0.5 2011 0.5 2012 0.5 2013 0.2 2014 0.2 2015 0.7