Year 2017 PPP (%) 2004 0.1 2005 0.4 2006 0.1 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0.2 2013 0 2014 0.5 2015 0.3 2016 0.8 2017 0.4 2018 0.1 2019 0.1 2020 0.3 2021 0.2