Year	% of GDP
1960	11.254632143228486
1961	8.141372340198826
1962	8.378675060090956
1963	13.087720064215297
1964	19.81903736244518
1965	22.65586339731652
1966	24.79143823630496
1967	26.826925682800802
1968	30.232934322839437
1969	34.17728239608229
1970	37.494092109557855
1971	36.753315076711
1972	36.45951457952232
1973	37.06838641871231
1974	35.96108915811723
1975	33.235116673353296
1976	32.90295645575231
1977	33.29079059767182
1978	33.57904482373836
1979	33.26323044477593
1980	32.82128599883253
1981	32.41802607539905
1982	31.296527949146824
1983	31.44068590342453
1984	32.476874584850094
1985	32.952228093129925
1986	33.82491657234944
1987	34.55890211002956
1988	35.37192327092883
1989	34.930069748137655
1990	34.76263003332733
1991	35.12695398822295
1992	34.40083982336526
1993	33.690998587406554
1994	32.942698910659736
1995	32.74995258137871
1996	32.81994419791342
1997	32.80428895430968
1998	32.33200858610271
1999	30.745806111737405
2000	30.94109769460729
2001	30.124429018132105
2002	29.818139169106857
2003	30.62083322098152
2004	31.77630404882822
2005	32.39733869119357
2006	33.59672100292227
2007	35.06525624827235
2008	35.45209324815898
2009	34.70821841725928
2010	36.218053670689635
2011	36.09245531838732
2012	35.89216591598322
2013	36.71837799784751
2014	37.173816777822545
2015	37.427565166216006
2016	36.87516111501763
2017	37.519909412551485
2018	37.583429000524724
2019	36.915721184776
2020	37.27737918774023
2021	39.10777534546193
2022	39.52245774801078