Year	% of GDP
1970	12.81680986326986
1971	12.92986868141813
1972	13.150660941991552
1973	14.509263066406602
1974	17.10778672436707
1975	16.47097741965635
1976	16.792023367386207
1977	16.868586805473146
1978	16.76371944229017
1979	17.88222905287535
1980	19.065397310631113
1981	18.87259021556233
1982	18.060100718126257
1983	17.278084156316563
1984	17.600338253126992
1985	17.178857378016104
1986	16.38155505042266
1987	16.657142336281698
1988	17.040565561911293
1989	17.5806691001271
1990	18.142484017398385
1991	17.999093999071913
1992	18.03285397830375
1993	17.651802629105553
1994	18.39196293266271
1995	19.635754759345673
1996	20.21562393917342
1997	21.154339143611388
1998	21.05352165832664
1999	20.567814827274336
2000	21.770093189368275
2001	21.25147956395698
2002	21.150673583824183
2003	21.64712026377001
2004	23.25945056285134
2005	24.276893467674125
2006	25.968561065121005
2007	27.35928096044579
2008	28.723439382094583
2009	24.735129100259655
2010	27.28614958147974
2011	29.557434457560365
2012	29.5111827207576
2013	30.01185332699563
2014	30.116519724749846
2015	28.62562789839098
2016	27.792354595903006
2017	28.9884701105376
2018	29.701955713587186
2019	28.858030677994655
2020	26.333501702216527
2021	28.901603203879812
2022	31.194871982846013
2023	29.623615669267387