Year 2011 PPP (%) 2003 0.2 2004 0.3 2005 0.8 2006 0.2 2007 0.3 2008 0.4 2009 0.3 2010 0.4 2011 0.4 2012 0.3 2013 0.5 2014 0.3 2015 0.3