Year	% of GDP
1968	16.333018999813163
1969	16.721770693231555
1970	17.46434418992666
1971	17.804426672437714
1972	19.11927597779108
1973	19.229172994284642
1974	18.010383529466605
1975	22.073249042778777
1976	24.561894682281743
1977	25.40912990134923
1978	25.638738828931256
1979	22.945982013199224
1980	22.408305392010103
1981	22.875383724045616
1982	22.79618229306371
1983	23.344265832058554
1984	22.50570892037208
1985	21.632572044590695
1986	22.285730163353726
1987	21.698652876836405
1988	21.254351039925858
1989	20.791196886561323
1990	21.14056757648118
1991	20.831435898215915
1992	21.17695427754391
1993	21.437350002300334
1994	21.582327569114256
1995	21.070042994238374
1996	21.604091401294834
1997	22.40936074751121
1998	22.641362039899494
1999	21.603313821689166
2000	21.00809288742627
2001	21.208216672035945
2002	21.125532363951486
2003	21.289409647604916
2004	22.595704009813534
2005	23.278301916458812
2006	24.254827983674694
2007	25.70018425782975
2008	25.828266173375425
2009	25.590422033375283
2010	25.252745592108816
2011	25.705410691094276
2012	25.61329664871121
2013	25.16483383887377
2014	25.21308330516301
2015	25.514938458200508
2016	25.207701882473284
2017	25.13273485638011
2018	25.42877705966588
2019	25.00534631292817
2020	24.212333970259174
2021	25.11448500618846
2022	25.55570348530074
2023	26.838672647071693