Year % of GDP 1991 59.003817821775705 1992 59.807626238556864 1993 61.079851600628565 1994 60.96252488325299 1995 60.78635768343666 1996 61.251633125781204 1997 61.39452541544269 1998 61.51818007437857 1999 61.83599086064873 2000 62.04894653509424 2001 62.51914132725474 2002 63.06453129388777 2003 63.45460758263749 2004 63.41053076827753 2005 63.55804575563296 2006 63.218478163042924 2007 63.18780001526737 2008 63.896757591859476 2009 65.81531961094495 2010 65.09883652016558 2011 64.83255972028952 2012 65.10760059636688 2013 65.44564546534633 2014 65.47755085410675 2015 65.1052556280981 2016 65.05899765369772 2017 64.96246964040319 2018 65.03791778181555 2019 65.17621696200808 2020 65.63174088560325 2021 64.97003632962831 2022 64.79421632564807 2023 64.96348186190953