Year	% of GDP
1960	14.758508775675791
1961	15.127523387493847
1962	15.439496713879027
1963	15.810264288177573
1964	15.837749982333404
1965	15.864541624139648
1966	15.938231956149036
1967	16.152772349098218
1968	16.583233520674018
1969	16.74705871882954
1970	16.997883816767175
1971	17.360477060031958
1972	17.403362579639204
1973	17.600490264352768
1974	18.027110160100875
1975	19.57765944818464
1976	19.877701641893974
1977	20.1625125893477
1978	20.547823393074328
1979	20.459305391627534
1980	21.046107532594018
1981	21.752992735080444
1982	22.201440641377225
1983	22.355160243008584
1984	22.530585689433263
1985	22.584068133495407
1986	22.30602654567417
1987	22.146000563095296
1988	21.697227130991177
1989	21.137153865980157
1990	21.16889058474903
1991	21.65502585405398
1992	22.25922051878764
1993	23.40903180841926
1994	23.186257434100625
1995	23.17666073203625
1996	23.469694138465787
1997	23.400942312556612
1998	22.615201169320716
1999	22.630994026405443
2000	22.32587237121978
2001	22.141919126251462
2002	22.721149443674353
2003	23.14342728676504
2004	23.044696097872148
2005	23.067039280142478
2006	22.75917930948283
2007	22.433139654675074
2008	22.562563366426083
2009	24.08080470062827
2010	23.989256694143055
2011	23.74452782761497
2012	23.95049990329394
2013	24.11168771422863
2014	24.12589283014655
2015	23.807877614590765
2016	23.732380717496618
2017	23.644004419212255
2018	23.271594960618728
2019	22.98354757787774
2020	24.84459615709853
2021	24.409839983565924
2022	24.009128897363183
2023	23.28322214690878