Year % of GDP 1994 32.80653996336974 1995 32.67571928442056 1996 32.74057872974071 1997 33.4438967968156 1998 28.58672970781208 1999 33.33068416933109 2000 39.50004222062511 2001 35.491600728319504 2002 37.44714490843558 2003 40.13180707267875 2004 44.40911391503807 2005 49.13801467152722 2006 50.511214619971526 2007 49.99886560968665 2008 51.98445498263281 2009 42.13879993694842 2010 44.31605501752429 2011 47.41508008377287 2012 48.358484212160576 2013 48.26663532374103 2014 45.132194279971706 2015 38.263459073818815 2016 35.86544226805914 2017 39.264887297226615 2018 43.05422873558092 2019 40.886785210521595 2020 34.51843542516968