Year 2017 PPP (%) 1994 0.1 1995 0 1996 0 1997 0 1998 0 1999 0.1 2000 0 2003 0.3 2004 0.1 2005 0.1 2006 0 2007 0.3 2008 0.2 2009 0.5 2010 0.4 2011 0.3 2012 0.4 2013 0.2 2014 0.1 2015 0.6 2016 0.6 2017 0.2 2018 0.5 2019 0.5 2020 0.6 2021 0.4