Year	% of GDP
1960	15.435554341889679
1961	16.068234091489906
1962	17.864363168535196
1963	18.4674539961549
1964	19.404151404151403
1965	16.883690134628118
1966	16.394716394716394
1967	14.06817105886066
1968	13.012997243009059
1969	10.747420767460849
1970	14.60207396301849
1971	12.86547975234766
1972	11.253509771760585
1973	13.197398048536401
1974	18.88831355951282
1975	25.945049560924133
1976	21.628434209348804
1977	23.9917660385632
1978	28.600380765215256
1979	32.18702435312024
1980	27.500000001121627
1981	32.09875035865378
1982	28.949946562166012
1983	30.82706766917293
1984	30.37974683544304
1985	29.75871313672922
1986	29.47845804988662
1987	26.019417475728158
1988	33.116883116883116
1989	31.68831038961039
1990	28.91440584551148
1991	23.733333333333334
1992	19.4823867721064
1993	19.84536082474227
1994	20.62857142857143
1995	20.147058823529413
1996	18.13426329555362
1997	17.562993606619028
1998	21.50313152400835
1999	21.618985695708712
2000	19.553072625698324
2001	18.260384722609423
2002	17.99947215624175
2003	16.886227544910177
2004	16.937976509375645
2005	17.97585886722377
2006	18.730775457341753
2007	20.851235230934478
2008	22.389726409826913
2009	19.190174630589137
2010	19.50107740759158
2011	17.103055940485742
2012	16.02675105989132
2013	14.211997419909697
2014	13.643192488262912
2015	14.288637014607799
2016	15.04023030929357
2017	17.144889083399438
2018	18.709013758518708
2019	20.05360972122945
2020	15.994863959951891
2021	15.171616814996023
2022	17.018807778131972
2023	12.877877779309529