Year % of GDP 1960 71.9882990989452 1961 72.58690300344658 1962 72.80954556637262 1963 73.29686177383454 1964 72.3312840081973 1965 71.6325141974824 1966 71.42926134305652 1967 71.64665810486348 1968 72.32169364167767 1969 71.98974778847695 1970 71.26445925949498 1971 71.65530130107281 1972 71.57207946986011 1973 71.1312292821527 1974 71.97804822131367 1975 74.13132323763332 1976 74.47030945079453 1977 74.58434781474999 1978 74.63943135140096 1979 74.74423043117953 1980 75.78967173561767 1981 77.95248879869015 1982 78.65710789792982 1983 78.51692205524265 1984 78.64150036066361 1985 79.19938127648679 1986 78.36412160138278 1987 78.83509368760828 1988 77.3160832887491 1989 76.41700455611706 1990 76.37483318241443 1991 76.71174905308669 1992 77.37048213810463 1993 78.77655480733618 1994 78.18813476434208 1995 77.8870581552739 1996 78.59576160336542 1997 77.53510466228902 1998 76.57319793830295 1999 76.24402301500572 2000 76.18324276250604 2001 76.26270966064232 2002 76.69434177105973 2003 77.38776671617609 2004 77.09767320669546 2005 77.4619246222192 2006 76.99554852390308 2007 76.54942926608152 2008 77.02847850309679 2009 79.45824825373808 2010 79.34494702271199 2011 78.7270406812384 2012 78.66937252130884 2013 78.74738627491452 2014 78.43559644891418 2015 77.85412512190507 2016 77.99567527210827 2017 77.62839091397423 2018 77.1533605889377 2019 76.59272204411242 2020 78.0410745903931 2021 76.98489839408053 2022 77.401394115855 2023 77.00834790053868