Year % of GDP 1996 64.68013840320465 1997 63.907856308917246 1998 66.55972472098121 1999 67.11430797058723 2000 66.56938891687987 2001 67.48604903668914 2002 69.40325389619089 2003 70.7182489721792 2004 71.45198021097819 2005 72.95085092028106 2006 73.27161242861585 2007 72.43835307889064 2008 72.3230981000324 2009 72.45328608247422 2010 72.46922024623802 2011 73.00623278736049 2012 71.65748349079176 2013 71.76984497329808 2014 72.88475391197939 2015 72.7584790113482 2016 72.04849149650518 2017 70.81707785988044 2018 70.21441479172262 2019 70.40577176691714 2020 73.51017868354327 2021 74.96168045840021 2022 74.60897385602445