Year % of GDP 1995 14.989335478761953 1996 15.195880324040969 1997 15.566630711140622 1998 15.773193000168451 1999 15.836363463329613 2000 16.60459323367771 2001 15.282474648017939 2002 14.614738265844945 2003 14.179812211879609 2004 13.983395467044469 2005 14.754097719888005 2006 14.988370458908213 2007 15.35896648870851 2008 14.791427355387338 2009 14.003298876688502 2010 14.044978198636645 2011 13.53589259279697 2012 13.73720593124046 2013 12.92671066976526 2014 12.362614216229506 2015 12.754977234882395 2016 11.905269395618266 2017 11.320437171190187 2018 11.492926047453803 2019 11.394307587366695 2020 11.167674505259603 2021 10.164802667072523