Year % of GDP 1990 71.19670727593237 1991 68.95545719728959 1992 71.81696755434088 1993 70.83083309549806 1994 70.40414042747575 1995 68.89512411780699 1996 68.7250820689297 1997 71.16290821420743 1998 69.37217614197004 1999 70.6525970235905 2000 69.91806105630961 2001 69.1786287292672 2002 70.70935442897796 2003 71.82381708631846 2004 69.34817958000225 2005 68.12029214746404 2006 66.8948061404505 2007 65.18317112458942 2008 66.50809080700296 2009 69.30559489368589 2010 69.58303175410168 2011 69.02816442710242 2012 68.8766351538013 2013 69.29246832645757 2014 67.65631191371095 2015 66.07485917907682 2016 66.34813971518528 2017 66.10674807948668 2018 66.86453162503389 2019 66.40442593608769 2020 67.09725175337543 2021 66.82074157306681 2022 66.86334915928734 2023 66.02682498729308