Year	% of GDP
1960	9.135121699452485
1961	8.805470031858334
1962	9.089580233226819
1963	9.38890691156436
1964	9.244207216072162
1965	9.12915855641871
1966	8.458400039538102
1967	8.833560860053904
1968	10.069178473888572
1969	10.094569224727735
1970	11.246947120919087
1971	11.522816129325893
1972	10.918283446171479
1973	9.741107753920106
1974	9.342764838857931
1975	10.316518795322038
1976	10.969408182627681
1977	10.637670189048922
1978	11.180458558112637
1979	11.95169111208266
1980	12.292107676042939
1981	12.758102582083614
1982	13.090667399845438
1983	12.87496365134414
1984	13.167083049286704
1985	13.52796941296575
1986	12.754930345031932
1987	11.325681178816906
1988	10.04677519846053
1989	9.520665416190232
1990	9.404615131371372
1991	9.220608196770982
1992	9.897969252264762
1993	11.00126063835981
1994	11.052264921701557
1995	11.250602828992886
1996	11.584261126839023
1997	12.083833123509917
1998	13.06449166902936
1999	13.569052403991295
2000	13.575965221644951
2001	13.47449701131955
2002	13.172384531416338
2003	12.925547500254462
2004	13.113690241494377
2005	13.653623372838686
2006	13.502262445593457
2007	13.925948467332672
2008	14.341950991915157
2009	15.980051905713283
2010	15.800815033477067
2011	16.141780961122343
2012	16.352982704533062
2013	16.36348544864879
2014	16.916361105534687
2015	17.12115126590936
2016	16.86518275760183
2017	16.298403787440932
2018	16.173966428236433
2019	16.16935203580708
2020	17.794887407430203
2021	18.231316448335193
2022	17.72257590984931
2023	16.64537383713926