Year	% of GDP
1961	14.470419375345282
1962	13.845652894848785
1963	14.268926369333398
1964	13.547665903593517
1965	13.960945517317079
1966	14.121166298706715
1967	14.012691225818235
1968	15.360794369042255
1969	16.323629590774754
1970	16.21368054479169
1971	16.49258893274032
1972	18.826232929602078
1973	19.35602836144737
1974	16.55664052388613
1975	21.114484524434946
1976	21.458385160640525
1977	23.072078126548607
1979	26.164733916628556
1980	25.867270582039904
1981	28.529244200487504
1982	27.022488434540463
1983	28.01211090730713
1984	28.305048558374956
1985	29.02209441248393
1986	32.49423835917071
1987	34.555361003856774
1988	35.28200434017625
1989	34.45231303737346
1991	29.324218772049843
1992	21.12455967893911
1993	21.488150031678426
1994	22.549190633442766
1995	24.280691176858035
1996	23.628575954275536
1997	26.886313094077565
1998	29.93870469801222
1999	31.87722381266958
2000	34.38220935481807
2001	34.937634184372534
2002	34.723535248789446
2003	33.93846936329117
2004	31.76754723745121
2005	31.878087931184012
2006	33.481183676587186
2007	34.818194537840554
2008	33.23416356788509
2009	36.43197908023094
2010	36.787590566351405
2011	36.30532333782947
2012	35.12830762028296
2013	32.6031303873334
2014	35.347001962855494
2015	39.450493518593305
2016	43.62904320346392
2018	27.68955976453111
2019	27.338453781151603
2020	32.011461353243476
2021	31.276087528413953