Year % of GDP 1960 25.892857443513133 1961 27.586207983692923 1962 29.508195892041332 1963 21.804511465559713 1964 26.17449660826089 1965 22.88225296678395 1966 23.768340195076124 1967 22.68636625857317 1968 23.662507797878977 1969 21.75328967133329 1970 22.30979655446794 1971 22.60743004108716 1972 26.80941311575613 1973 24.348904336258116 1974 25.28733518453815 1975 27.277416319032845 1976 30.379360630475027 1977 34.88702915285055 1978 31.93409358652447 1979 36.88478616167339 1980 32.10144559857155 1981 31.18104620577842 1982 37.11942098914355 1983 33.79333982395835 1984 35.05631669360503 1985 31.813521553991254 1986 34.038858900445334 1987 35.48353466281365 1988 38.54395330473007 1989 32.68930939273408 1990 35.64813955167683 1991 38.42256047721073 1992 38.226131412797606 1993 36.54299660279681 1994 38.753523581474944 1995 40.20462641452007 1996 21.573722272900035 1997 24.275379229871646 1998 27.4400299850075 1999 23.539745278875714 2000 22.55372448902864 2001 20.96404561472224 2002 21.67382940696661 2003 27.376312079610702 2004 31.576118181653236 2005 35.09999884129365 2006 42.4 2007 38.79999877319931 2008 47.19999958140146 2009 35.80000355919141 2010 39.50000539773943 2011 43.0000028373483 2012 43.70537319162008 2013 46.60407908676551 2014 42.99502580526304 2015 22.838283415772082 2016 23.043725257044933 2017 22.24029310119765 2018 26.59970246477735 2019 29.026209999788904 2020 26.773329999594953 2021 28.81865999954391 2022 28.315320358728957 2023 29.593247869507085