Year 2017 PPP (%) 1994 0.1 1995 0.1 1996 0 1997 0.1 1998 0.1 1999 0.1 2000 0.1 2003 0.3 2004 0.1 2005 0.1 2006 0.1 2007 0.3 2008 0.4 2009 0.6 2010 0.4 2011 0.4 2012 0.5 2013 0.3 2014 0.2 2015 0.6 2016 0.6 2017 0.3 2018 0.5 2019 0.6 2020 0.7 2021 0.4