Year % of GDP 1965 46.967424342736386 1966 47.48923425619252 1967 48.76248682250824 1968 48.99614951248456 1969 49.84272133687864 1970 49.9999974230043 1971 49.765150684037486 1972 49.17891393811212 1973 50.58990026533572 1974 52.59002422914549 1975 52.63759775256979 1976 53.42959810981532 1977 47.961631971947625 1978 52.68960283112607 1979 48.53466979698154 1980 39.552544497345046 1981 37.658091375504355 1982 36.97583531641234 1983 39.08326584489452 1984 35.82629161463847 1985 40.54842209703664 1986 42.60175857780904 1987 43.619164867904566 1988 44.81562146322652 1989 43.21254850971529 1990 44.88785360004304 1991 44.69792220041175 1992 45.773479151734925 1993 47.418994606731566 1994 44.831615628489686 1995 45.91205441404055 1996 45.10764732435496 1997 45.311261271167155 1998 45.569272787660644 1999 45.678878494696185 2000 45.029452682435085 2001 46.435633703091455 2002 45.95072431807474 2003 45.90001699497493 2004 48.11040194300887 2005 48.1626860371302 2006 47.929620733058414 2007 49.101554399633685 2008 49.599499923180815 2009 50.62330927220913 2010 50.632727932319156 2011 51.77038188219193 2012 50.76169206688383 2013 50.31741530364279 2014 50.42782014576507 2015 49.56032168900222 2016 50.46646052417124 2017 50.36268779938232 2018 50.44644881855329 2019 51.02687347630507 2020 51.76192077323027 2021 50.921320026446196 2022 49.95817754064691 2023 51.60077719214124