Year % of GDP 2000 12.202710189868704 2001 12.871548482966286 2002 13.660911871002961 2003 14.10714258130732 2004 14.12596206277912 2005 14.121779464221552 2006 14.24091579184533 2007 14.414039988977622 2008 14.674423984600656 2009 15.720389826407997 2010 15.661411263142844 2011 15.546026447862264 2012 15.552451462053524 2013 15.44149871756355 2014 15.646555075246006 2015 16.039578282780276 2016 16.368531943160086 2017 16.312843373119225 2018 16.18838663785215 2019 16.24181798499171 2020 18.34399602972855 2021 16.968274857994174 2022 16.151610688218586