Year	% of GDP
1960	12.53676604324711
1961	12.992999109786702
1962	14.044125731983318
1963	14.180721731945786
1964	13.8606251051099
1965	14.171775695531439
1966	13.647366187824511
1967	15.259891375509744
1968	15.257382689676977
1969	15.560629317648065
1970	15.94301172300886
1971	17.535854440887043
1972	18.400940587426355
1973	19.18055026247553
1974	19.16189005412776
1975	18.66139176543462
1976	19.682539780297304
1977	20.173480770052645
1978	20.012290339727517
1979	21.041332056114005
1980	21.510622606375605
1981	22.639789635805496
1982	21.32183955585122
1983	22.132402868171084
1984	22.909307652729286
1985	21.92124874513479
1986	23.875569508006063
1987	24.254778069346653
1988	25.838760340611078
1989	26.748309976826253
1990	27.20360600024871
1991	28.241087112163076
1992	27.517154238270138
1993	26.174639780402558
1994	25.90148247941904
1995	26.20811197990143
1996	25.665997787265304
1997	26.46817300772136
1998	27.14785944133779
1999	28.17494831753805
2000	28.375445282081017
2001	27.826767478621612
2002	28.515031775287554
2003	29.580502945639935
2004	29.418968054502248
2005	29.615068059761946
2006	30.168079971011746
2007	30.587449666995397
2008	30.554730543511756
2009	29.46214006549765
2010	30.930478819445888
2011	28.995880924454486
2012	27.972787351843138
2013	27.588690746175924
2014	27.573500956591772
2015	27.37407119594164
2016	27.14423936883706
2017	27.014815480534665
2018	26.71283439185266
2019	25.621596414365793
2020	25.55533257124205
2021	27.16759949324868
2022	27.051490057984186
2023	24.909736857655783