Year	% of GDP
1966	18.1286391258205
1967	17.679013248034337
1968	17.560981538052182
1969	17.22553206889399
1970	16.879500787141424
1971	16.644384688118784
1972	16.183665385191084
1973	16.3547382278617
1974	16.616430879650316
1975	16.64800601363782
1976	15.99082458120976
1977	15.961065221008683
1978	15.347426204547892
1979	15.244261471855678
1980	16.009665724102014
1981	15.525175324257825
1982	15.251444222042764
1983	15.534854777031216
1984	15.994333164541107
1985	15.908408815616374
1986	15.635820110036011
1987	15.069636993715745
1988	14.751428939181347
1989	14.786494580722517
1990	14.86523507565134
1991	14.647276093051104
1992	14.777025062004952
1993	14.319426231819254
1994	14.449147081260424
1995	14.717121533641484
1996	14.176842456923461
1997	14.626121488778853
1998	14.527023225314476
1999	14.255235398011434
2000	14.14484978344117
2001	14.036548370233195
2002	13.93329255426872
2003	13.237480344892552
2004	12.749145302909726
2005	12.035149442885045
2006	12.066114930102486
2007	11.951549426395895
2008	11.72278862906704
2009	11.105072167067846
2010	10.933884025421097
2011	11.043316403875698
2012	11.434044394545612
2013	11.77968841391103
2014	11.860200642925655
2015	12.403444809669182
2016	12.934185694497566
2017	13.009357933560706
2018	13.088420594795968
2019	13.406734753429312
2020	12.822090942481859
2021	12.538229512937477
2022	11.6586908802277
2023	13.92456497625973