Year	% of GDP
1965	27.84931770132616
1966	23.93412625800549
1967	23.63157894736842
1968	21.48345617061314
1969	21.633195510927347
1970	20.51349920592906
1971	19.88197911938266
1972	19.765807962529276
1973	20.49856683748806
1974	20.739113580565967
1975	25.726427012748367
1976	29.125711329539577
1977	30.658332953145674
1978	31.039896936269578
1979	30.527036276522928
1980	28.301087417031496
1981	30.99471407976934
1982	34.0313046374157
1983	31.848414812723842
1984	32.125257313954215
1985	28.137868144707408
1986	24.98882743980783
1987	21.624581533981306
1988	20.545920605962635
1989	22.492413893784086
1990	24.36088279075788
1991	24.04479249800479
1992	27.204541143165667
1993	28.11361931391939
1994	27.056747903729654
1995	24.165777220000233
1996	23.194327163634266
1997	23.67173130399156
1998	24.03423622998691
1999	24.354970274619888
2000	25.166647414162142
2001	25.325076229115744
2002	24.76383840103097
2003	22.900387864258818
2004	22.12881547948556
2005	21.449929545508827
2006	22.58360615610562
2007	23.04324719991176
2008	23.62881106937901
2009	24.333471944809908
2010	26.007808356289903
2011	23.110845761891266
2012	23.8562334816964
2013	23.310053958926485
2014	21.538645407123074
2015	20.981445888853504
2016	20.49767596595125
2017	20.046269293167924
2018	19.600799039170443
2019	19.434735583765015
2020	15.845566023052296
2021	15.94430013591672
2022	16.46287234757329
2023	16.929682722650597