Year	% of GDP
1960	43.462987503500486
1961	43.00176797356322
1962	41.07948178885745
1963	41.67636291722521
1964	42.45370906207857
1965	40.47664053416668
1966	41.38305861459954
1967	43.47605086497543
1968	42.89697539478657
1969	42.395228741342535
1970	41.16575727912495
1971	39.23501382701837
1972	39.67308725811769
1973	42.26301085569923
1974	40.48938295135972
1975	39.70870789338763
1976	35.581542733428094
1977	36.25775056834464
1978	35.59962587800453
1979	34.23970968547088
1980	33.75547710653727
1981	32.82509906413373
1982	32.097862482069786
1983	32.25308951887908
1984	31.220847378211236
1985	29.833249534609713
1986	28.841946850045975
1987	28.187831064765902
1988	28.65889474835396
1989	27.92158227098378
1990	27.677024524141636
1991	27.70297253742326
1992	26.989096948354362
1993	26.601850055651756
1994	26.264071105796123
1995	24.768030668674758
1996	24.94817308108669
1997	24.367120196094522
1998	24.303091762319486
1999	23.357951891346573
2000	22.487245997702964
2001	22.215582006209463
2002	20.17062951740865
2003	20.01672036476678
2004	18.569007903070585
2005	18.273649609604885
2006	17.403241296319187
2007	17.247583429054533
2008	17.355578802442047
2009	17.404512064210895
2010	17.511748812982823
2011	17.770774083392933
2012	17.40866839990451
2013	17.59112036408677
2014	17.232061209689924
2015	16.709311117991817
2016	16.57568216286298
2017	16.628878091176954
2018	16.12057761293279
2019	16.47894904277863
2020	18.06145237591616
2021	17.134621471024783
2022	16.497665880469324
2023	15.98193969197077