Year 2017 PPP (%) 2006 17.6 2007 14.1 2008 10.9 2009 10.1 2010 11.3 2011 13.2 2012 13.5 2013 14.2 2014 13.3 2015 11.6 2016 8.6 2017 6.8 2018 5.5 2019 4.6 2020 4.1 2021 3.1