Year 2017 PPP (%) 2006 6.7 2007 4.9 2008 3.7 2009 3.1 2010 3.9 2011 4.8 2012 5.2 2013 5.7 2014 5.7 2015 4.6 2016 3.1 2017 2.9 2018 2.2 2019 1.8 2020 1.6 2021 1.3