Year $ 2017 PPP (%) 2002 0.36 2003 0.15 2004 0.1 2005 0 2006 0.02 2007 0 2008 0 2009 0 2010 0.03 2011 0 2012 0 2013 0 2014 0 2015 0 2016 0 2020 0