Year Percent of GDP 1988 57.365 1989 56.332 1990 55.932 1991 56.134 1992 56.028 1993 60.629 1994 63.721 1995 67.865 1996 67.807 1997 63.056 1998 68.819 1999 61.103 2000 65.738 2001 66.355 2002 66.978 2003 64.896 2004 64.849 2005 68.318 2006 67.001 2007 64.74 2008 68.417 2009 79.58 2010 82.418 2011 82.178 2012 81.661 2013 81.011 2014 83.758 2015 84.404 2016 82.866 2017 78.489 2018 74.243 2019 71.168 2020 68.395 2021 66.117 2022 64.317 2023 62.652 2024 61.16