Year 2017 PPP (%) 2004 2.6 2005 1.8 2006 1.3 2007 1.1 2008 1.3 2009 2 2010 1.6 2011 0.7 2012 0.9 2013 0.8 2014 1.2 2015 0.8 2016 1.1 2017 1 2018 0.7 2019 0.5 2020 0.3 2021 0.2