Year	% of GDP
1964	21.979009829938636
1965	21.36173036362915
1966	22.850032307372203
1967	21.46175721649311
1968	20.7294874255752
1969	21.86708216800961
1970	24.536092793280794
1971	16.95183635891899
1972	20.94842408605374
1973	21.5691919748321
1974	27.405660787560333
1975	22.2490715170153
1976	27.611182173562053
1977	25.36530295821187
1978	21.496853094025965
1979	21.32883993490328
1980	23.064242193433813
1981	41.572952545457866
1982	39.662423229975566
1983	30.05441757099109
1984	25.92310496677644
1985	32.728521197402216
1986	13.543311344584103
1987	5.380554314534482
1988	3.542139689814715
1989	0.6171399035157393
1990	-2.1474461395710467
1991	-1.6893811380807027
1992	-3.4718268487321664
1993	-0.47343375117471287
1994	5.236145730634289
1995	15.07113365038789
1996	21.802720082720803
1997	22.717514442264104
1998	24.763001611373355
1999	-5.112669617448673
2000	-0.4449981896837466
2001	2.74028469765747
2002	9.574912389497598
2003	6.566777631794335
2004	8.005832486162248
2005	12.454288703765005
2006	17.37525115245233
2007	18.027285465538743
2008	21.404836722532643
2009	14.323865964934345
2010	17.41983655346054
2011	17.8354759139255
2012	17.85373049027145
2013	18.64141364296162
2014	21.25890703534445
2015	17.572576715401038
2016	14.22902893014152
2017	11.087687914106086
2018	11.967526989260005
2019	14.614207253220886
2020	13.06608678086771
2021	12.202362624537212
2022	12.628473773355353
2023	4.6666782089649965