Year	% of GDP
1960	18.883500961713406
1961	19.962938010890337
1962	16.887657381036327
1963	18.104885348362725
1964	19.846197226593233
1965	18.473824607390277
1966	18.183625169858857
1967	19.609609160590782
1968	19.65952036081795
1969	21.514551932754955
1970	22.19487886391691
1971	24.644657633892077
1972	27.624973501769702
1973	29.946342212705083
1974	32.274695870791824
1975	34.313961730057294
1976	33.87163179109493
1977	37.7936592450026
1978	37.76867729056735
1979	39.781995070121305
1980	40.05953839265253
1981	41.35943240290531
1982	40.63138516551001
1983	41.87082718475716
1984	36.01873373190704
1985	33.615541628107636
1986	33.47832876166552
1987	37.69491079797129
1988	37.447240735515926
1989	35.07539317796342
1990	36.15551880103101
1991	35.59634080428537
1992	31.46620992930147
1993	28.08802276048729
1994	17.94287116434503
1995	18.159245012211088
1996	10.99059277815003
1997	10.89252930679278
1998	10.25233579267229
1999	9.334182929870359
2000	9.650217080209174
2001	9.444312816170557
2002	9.641545204666782
2003	9.025656485758523
2004	9.42657315994687
2005	8.797598828441927
2006	10.09466994571583
2007	12.09778626671593
2008	11.974664450289522
2009	12.640673285314913
2010	13.040498329235259
2011	13.127023122056652
2012	13.627907142642993
2013	14.264608290058467
2014	14.621456227823328
2015	16.648878587159324
2016	17.56947086811709
2017	19.218283300538243
2018	19.245948983795444
2019	19.021539414211304
2020	20.547145028867398
2021	20.976653150050637
2022	21.058883163244634
2023	22.440076358295336