Year	% of GDP
1960	10.519913539229474
1961	10.85454722798752
1962	10.900157629177064
1963	10.924488177089248
1964	10.242191680757209
1965	9.877801853890263
1966	10.18115557276093
1967	10.144629924893545
1968	10.26957996471372
1969	10.032812068730657
1970	10.061543965276822
1971	10.35612833495883
1972	10.807156020896507
1973	12.973144123804362
1974	17.340146853585434
1975	15.363410273136111
1976	16.327296806570118
1977	16.22152344395135
1978	16.019866857129294
1979	18.119567958532635
1980	18.587429556718373
1981	15.614534301914345
1982	15.744322021143772
1983	15.983398528187262
1984	16.251280008464292
1985	15.309129378006034
1986	14.023548693933014
1987	16.465114460204074
1988	17.6250232989281
1989	19.0705320074161
1990	18.203776782862413
1991	18.130864410275535
1992	25.147296207773916
1993	21.183494432232376
1994	20.801184065181488
1995	21.338821840296955
1996	20.938001893528998
1997	21.40595263084276
1998	21.108647083405344
1999	23.320654193701557
2000	25.605667465431747
2001	24.869941634037023
2002	26.54358636825606
2003	28.078164275798844
2004	30.234673003461253
2005	31.21320711597094
2006	31.979730429079034
2007	31.230328205823437
2008	31.38999845291343
2009	26.043753808838993
2010	27.450365082627542
2011	28.025845765056662
2012	27.39983433925872
2013	26.645100441861437
2014	25.763406037866854
2015	24.209045390532722
2016	23.172980396523858
2017	23.818453688227486
2018	24.850338450970384
2019	24.000451343596836
2020	22.95734836351751
2021	25.368218600031007
2022	26.986654294041458
2023	25.334727408919395