Year	% of GDP
1960	26.66541946657967
1961	23.28126028582041
1962	19.47105527661991
1963	19.00488403544384
1964	17.048156428051946
1965	16.379210163704347
1966	17.633492029486845
1967	17.8896661150225
1968	16.81417947289768
1969	16.788079508638816
1970	16.53224003385941
1971	18.56780760616478
1972	17.457518294326572
1973	15.978603052740931
1974	11.780078004647669
1975	14.356740466636614
1976	13.742908626418767
1977	14.708081880222812
1978	15.397160109397861
1979	15.064281589762329
1980	15.200000016246154
1981	15.099268272471775
1982	16.184971659594392
1983	16.217373277129703
1984	16.031390247767902
1985	16.718158430613283
1986	18.998330422434726
1987	19.431572120052653
1988	20.114448458738348
1989	18.001417537896614
1990	16.066930619334258
1991	14.718769070819068
1992	16.017935622630496
1993	17.32418591226842
1994	17.874623149666636
1995	16.763789836496326
1996	15.774318804056383
1997	16.538378564599792
1998	17.791908515614253
1999	16.787234752167716
2000	13.58394563471835
2001	15.106198067968768
2002	15.828301086149352
2003	15.119133317555095
2004	13.966864225154774
2005	12.425361560666708
2006	11.951445230217448
2007	12.388165629170794
2008	13.765760714401598
2009	16.371568812663327
2010	16.963305677036843
2011	20.11290657828388
2012	19.750292559367832
2013	18.535080427414023
2014	18.993282612517604
2015	20.52446564375014
2016	20.02184261117771
2017	18.829042197727603
2018	17.40371176050621
2019	18.261026078753495
2020	19.803159717165585
2021	18.252705211781606
2022	16.374078111807126
2023	16.928957521576415