Year 2017 PPP (%) 2004 5.8 2005 3.8 2006 2.7 2007 1.7 2008 1.2 2009 1.3 2010 1.3 2011 1.2 2012 1.2 2013 1.2 2014 1.2 2015 1.1 2016 0.8 2017 0.6 2018 0.5 2019 0.2 2020 0.4 2021 0.3