Year $ 2017 PPP (%) 2002 4.27 2003 3.27 2004 1.19 2005 0.83 2006 0.3 2007 0.16 2008 0.09 2009 0.11 2010 0.03 2011 0 2012 0.01 2013 0 2014 0 2015 0 2016 0 2020 0