Year 2017 PPP (%) 1987 2.2 1994 0.5 1995 0.6 1996 0.4 2000 0.2 2002 0.5 2003 0.2 2004 0.1 2005 0.1 2006 0.4 2007 0.2 2008 0.4 2009 0.8 2010 0.9 2011 0.8 2012 0.6 2013 0.9 2014 0.6 2015 0.5 2016 0.4 2017 0.3 2018 0.1 2019 0.1 2020 0.2 2021 0.1