Year 2011 PPP (%) 1996 0.6 2004 0.1 2005 0.2 2006 0.2 2007 0.3 2008 0.3 2009 0.3 2010 0.4 2011 0.3 2012 0.3 2013 0.3 2014 0.6 2015 0.5