Year 2011 PPP (%) 1993 0.5 2003 1.3 2004 0.6 2005 0.3 2006 0.5 2007 0.3 2008 0.2 2009 0.2 2010 0.4 2011 0.6 2012 0.4 2013 0.6 2014 0.5 2015 0.4