Year	% of GDP
1968	27.629631641755875
1969	24.45070963392578
1970	22.398545334325153
1971	23.963147935601945
1972	20.159277012182944
1973	-13.405169301855462
1974	30.930552798729654
1975	17.398042910107577
1976	30.766575196954943
1977	30.59830759288929
1978	36.28784297341968
1979	26.28199330740707
1980	22.909454292348475
1981	21.158964141508935
1982	25.8534570387601
1983	34.35046427419066
1984	32.82893457128082
1985	21.453132722856733
1986	19.459350350909883
1987	17.718138789957965
1988	19.688429409504447
1989	19.44491899234033
1990	15.684013393110494
1991	19.985621274052054
1992	22.963649750484034
1993	25.054973743134557
1994	20.35714991209529
1995	20.286129428858835
1996	18.571301147274195
1997	18.77757290832038
1998	22.94933939913664
1999	21.513622969498993
2000	19.316964995546527
2001	19.623151382444433
2002	19.693342822022387
2003	19.492412381885604
2004	19.864616817979908
2005	20.174833498676843
2006	22.215161131030943
2007	26.472918418785408
2008	27.295794561772347
2009	31.715282356721108
2010	30.92634859956472
2011	27.541085686810806
2012	27.04637092788226
2013	26.890030109742085
2014	29.01798820915189
2015	34.22351772468838
2016	30.897537537537538
2017	28.796149528388092
2018	26.1230627629982
2019	28.29555131974695
2020	27.691494187252157
2021	25.44811986266372
2022	26.427404590123555
2023	29.342120118817938