Year % of GDP 1991 32.1293272434145 1992 33.309767064323054 1993 35.24667400736004 1994 40.67177411814371 1995 51.96492172413858 1996 46.42549819147296 1997 49.70741822001808 1998 47.5012475872667 1999 42.13726672532089 2000 40.32511623979705 2001 40.06939313029213 2002 38.34564989905937 2003 38.67246015613437 2004 37.26261275945192 2005 36.94227268444107 2006 35.78404169534347 2007 37.28712880716085 2008 37.51461349225368 2009 35.58986317613235 2010 34.78885947886937 2011 34.61192825035399 2012 34.88255788028625 2013 35.5240411621976 2014 36.80269270471018 2015 37.99723906822793 2016 38.746912313449336 2017 38.854719912582375 2018 38.06473519190894 2019 39.105638413351805 2020 39.55234971062166 2021 39.57700931767772 2022 36.04827373621766