Year	% of GDP
1972	12.431510970963929
1973	11.448897063400992
1974	13.24104555598002
1975	12.552259094174028
1976	12.021356216663776
1977	12.77472095530871
1978	12.741294243450895
1979	13.488459802188322
1980	14.330351753377776
1981	14.971407893596034
1982	14.056957734478706
1983	15.547091091400636
1984	15.53574109452503
1985	15.433695826213809
1986	15.205086785650183
1987	15.155245208884589
1988	16.120294746837523
1989	17.074709597981506
1990	18.526387449593987
1991	19.149496594148005
1992	17.635222940375925
1993	17.443539396940515
1994	18.088661431409914
1995	18.47878919218307
1996	18.817687390430397
1997	18.475217130082733
1998	16.012134713785
1999	15.426217987876804
2000	15.4733501386637
2001	16.771756824741473
2002	16.19778157702747
2003	18.309265258629672
2004	18.30395423616169
2005	19.657729913647163
2006	18.744871414090753
2007	18.264124100183544
2008	18.81851613419651
2009	17.43962194783193
2010	18.998106890682905
2011	19.8124475584625
2012	18.938070794950242
2013	20.609107850221037
2014	19.68960636691863
2015	20.544710874568306
2016	19.81237354049183
2017	19.11911048316343
2018	19.50624038305067
2019	19.26291288195154
2020	19.33046176939698
2021	18.451427807632225
2022	18.24859480084333