Year % of GDP 1990 23.154767390630234 1991 22.349845830135926 1992 22.084556758125327 1993 20.665159559205552 1994 22.30854894338255 1995 19.89724230050439 1996 17.834545846367213 1997 16.951190057262657 1998 17.437604442183197 1999 23.09459588260588 2000 22.802529541137844 2001 22.052073833653544 2002 20.4946878363375 2003 22.16828007896263 2004 23.051887362724116 2005 22.22571283671243 2006 21.853970892529702 2007 23.02119883723265 2008 24.397678162016753 2009 25.033011961799435 2010 23.482652266529836 2011 23.821133605038092 2012 24.016522765145456 2013 24.22423533073126 2014 24.14707781474448 2015 24.385305405517837 2016 23.701558620368736 2017 23.95568010463494 2018 23.293705024341776 2019 22.831121768296033 2020 22.208973946749953 2021 22.753411222263725 2022 23.740330636546194 2023 24.50853008421566