Year	% of GDP
1967	18.44180981024891
1968	20.728945981522063
1969	21.10761420625704
1970	20.84325107084166
1971	20.24084055275238
1972	21.88538410859381
1973	24.576688212273712
1974	30.04241995015921
1975	26.190608305455587
1976	29.766344174739363
1977	28.845273367037876
1978	25.164502361045148
1979	27.653161893814378
1980	29.618273928819562
1981	27.562651471859557
1982	24.561137955568714
1983	23.08435216095086
1984	22.814350208180937
1985	22.43168541049845
1986	19.393009273232046
1987	20.210418148105457
1988	20.180391439619225
1989	21.35352449470745
1990	21.320040749597695
1991	19.884496528611706
1992	19.49638504385723
1993	19.783260624380492
1994	20.70580864247928
1995	21.9052977261588
1996	22.77035914335105
1997	22.287996616085763
1998	21.250482147499227
1999	21.468048809624605
2000	23.008350348055593
2001	22.26984063308847
2002	23.055120499702586
2003	23.850642481746338
2004	25.78369674993011
2005	27.1527194937106
2006	28.539706000668126
2007	28.559675745059966
2008	28.892520034367635
2009	26.29968288921613
2010	28.190876395098073
2011	28.3799780083993
2012	27.454670130123702
2013	26.1826113391031
2014	24.90753907588731
2015	23.6954871617772
2016	24.260735258019107
2017	25.17458392563231
2018	25.81898894401254
2019	25.061375450553015
2020	23.695512721979263
2021	25.4557668860184
2022	26.40074165067443
2023	25.438209548742446