Year 2017 PPP (%) 1992 0.9 1993 0.4 1995 1.9 1996 1.9 2002 0.5 2003 0.2 2004 0.1 2005 0.1 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0