Year % of GDP 2001 22.564452155408677 2002 22.05712516776423 2003 22.991471171662877 2004 23.296905718971487 2005 25.176320538319924 2006 27.191112247481485 2007 25.757405526475456 2008 27.266032641078837 2009 27.63464141913879 2010 26.706995092544933 2011 24.944391195102906 2012 25.23012661836983 2013 25.67695629712946 2014 26.528008188949347 2015 28.41212512490821 2016 27.21366304148233 2017 26.04327769676598 2018 26.68469505167994 2019 24.670848991068734