Year	% of GDP
1970	13.59189050145417
1971	19.39202173540286
1972	23.87246868092622
1973	13.736309116340765
1974	14.36376037291826
1975	11.163080828622133
1976	13.283443341858023
1977	16.96310699675178
1978	15.017088679504983
1979	16.984376514746295
1980	16.68422236263568
1981	13.82736715255637
1982	16.286405029985783
1983	17.610487418959465
1984	18.233153031130943
1985	17.635785656700325
1986	18.61492871539819
1987	15.189704788462505
1988	17.27000730993127
1989	18.319007703475016
1990	18.90763765422961
1991	21.075590885691504
1992	22.806721991456094
1993	21.41016565764668
1994	21.120825945731745
1995	21.072717412101678
1996	21.984950729906696
1997	23.12620985748317
1998	23.513649889306524
1999	23.906958567673637
2000	25.38472833558179
2001	23.034036806407425
2002	21.21578559378199
2003	22.032133240744777
2004	22.784171212184
2005	23.343535486250467
2006	23.63264819804609
2007	23.30172060960339
2008	22.42943595078841
2009	23.125409895367003
2010	22.993069763314754
2011	22.94663400552536
2012	23.440295212625358
2013	23.98690918528045
2014	24.30713626485976
2015	25.184338552177994
2016	25.008945907790007
2017	25.107115002242423
2018	25.10224088299426
2019	26.076726217755404
2020	28.50190018832539
2021	28.678202577893025
2022	29.90006767094262
2023	29.417635200209823