Year % of GDP 1960 10.819649130380819 1961 4.887589560512942 1962 5.225651458032661 1963 23.54371533795494 1964 28.421759338607224 1965 22.44082510604829 1966 13.894832424523592 1967 13.18330454897421 1968 13.59696093414301 1969 17.625235036007954 1970 13.510777828467155 1971 15.066289323504616 1972 13.963501939878409 1973 17.17927205620335 1974 16.42098752424217 1975 17.261191446034534 1976 17.965444584140762 1977 18.01215277777778 1978 19.4494011980782 1979 19.608372632868008 1980 21.686438340389635 1981 22.41183595716729 1982 20.163447141821276 1983 22.76094046208531 1984 21.07540845310657 1985 23.39771497874898 1986 21.11701247936257 1987 24.41452993861957 1988 24.921065976646815 1989 21.01993020757486 1990 24.14846183569274 1991 25.347598161565738 1992 33.66447433902762 1993 34.80834689951162 1994 37.30228030029307 1995 38.126793658035815 1996 39.43311518482361 1997 42.67394737498796 1998 35.41823862786485 1999 40.20945163666983 2000 43.2633943629311 2001 36.79007407928008 2002 32.83822149864075 2003 38.16460417974488 2004 37.25629614587079 2005 38.69495720514683 2006 36.821150035775226 2007 38.64175484009249 2008 36.100770506756504 2009 40.50568563108132 2010 37.42503642768874 2011 31.023637618148964 2012 32.147479936158994 2013 33.615788796085596 2014 37.30047678105053 2015 30.265835319653643 2016 39.27155849009842 2017 38.26852584033903 2018 40.765261954336445 2019 38.928010464706176 2020 32.03956797992677 2021 47.60210020220189 2022 36.49812312027249 2023 32.978820290602975