Year % of GDP 1965 28.278461832008375 1966 28.045229166393963 1967 29.796415555744883 1968 29.507614492744068 1969 30.10641414166407 1970 28.223648928668066 1971 31.08276329128573 1972 29.384673346488288 1973 30.880832038800715 1974 28.444964759848077 1975 28.96619825937094 1976 26.178979246058283 1977 27.24665340311337 1978 28.774287148662648 1979 27.415562915233732 1980 28.845770911591888 1981 21.531396602771046 1982 22.416629466197723 1983 27.493980486405956 1984 28.857154652511795 1985 26.641945338810945 1986 29.812256798468457 1987 32.96280235162519 1988 32.68696086020429 1989 34.003930580412145 1990 34.06265370519804 1992 45.78535620051375 1993 46.63690571252075 1994 49.24788632630093 1995 45.26475177557112 1996 40.030810204232445 1997 39.01165079730932 1998 36.73168798877548 1999 55.493199935780154 2000 51.199586994576244 2001 50.35631147283094 2002 38.692056422161365 2003 46.32958763637264 2004 51.61774353733862 2005 53.57969181183443 2006 55.42537088237759 2007 56.08935683463445 2008 46.714081368244095 2009 49.24825993945885 2010 50.79197258641314 2011 46.49701016675537 2012 46.1419928375706 2013 42.83958345824569 2014 41.89421532179426 2015 41.60331766206798 2016 42.335428280323626 2017 44.908517638160504 2018 40.52292347964835 2019 39.59506949380234 2020 37.30065104682218 2021 35.54809743733068 2022 34.50303013349012