Year % of GDP 1965 28.278461832008382 1966 28.045229166393963 1967 29.79641555574488 1968 29.50761449274406 1969 30.106414141664068 1970 28.223648928668073 1971 31.082763291285737 1972 29.384673346488306 1973 30.880832038800722 1974 28.444964759848073 1975 28.966198259370948 1976 26.178979246058287 1977 27.246653403113378 1978 28.77428714866264 1979 27.415562915233732 1980 28.84577091159188 1981 21.531396602771053 1982 22.416629466197723 1983 27.493980486405952 1984 28.85715465251179 1985 26.641945338810952 1986 29.81225679846846 1987 32.96280235162519 1988 32.68696086020428 1989 34.003930580412145 1990 34.06265370519804 1992 45.785356200513746 1993 46.63690571252074 1994 49.24788632630094 1995 45.26475177557113 1996 40.030810204232445 1997 39.01165079730932 1998 36.73168798877547 1999 55.49319993578013 2000 51.199586994576244 2001 50.35631147283095 2002 38.69205642216136 2003 46.32958763637264 2004 51.617743537338605 2005 53.5796918118344 2006 55.42537088237759 2007 56.08935683463447 2008 46.7140813682441 2009 49.24825993945887 2010 50.79197258641313 2011 46.49701016675537 2012 46.14199283757059 2013 42.8395834582457 2014 41.89421532179428 2015 41.603317662067994 2016 42.335428280323626 2017 44.90851763816051 2018 40.522923479648355 2019 39.59506949380234 2020 37.30065104682219 2021 35.54809743733069 2022 34.50303013349012