Year % of GDP 1998 29.482675227047345 1999 30.00968682881523 2000 27.844734528539156 2001 28.521390834422284 2002 27.785783945124333 2003 25.056414836367274 2004 21.658599941231355 2005 19.35322536732832 2006 16.29183288958597 2007 17.613614660959556 2008 18.335955124032434 2009 28.23145054835764 2010 34.135837255427774 2011 37.24773345108925 2012 40.388242639617935 2013 43.88270066524394 2014 46.2693436335921 2015 45.16991521641623 2016 47.27993299973249 2017 44.32707463202178 2018 42.564734834764 2019 43.36184447636789 2020 57.295863582058345 2021 55.91295880260684 2022 50.45296898252209