Year	% of GDP
1970	12.033497287827434
1971	11.769725205391286
1972	11.639493799125026
1973	11.143025266908541
1974	12.27355080628442
1975	13.027298303078458
1976	11.9519299352193
1977	12.214532576069468
1978	12.12214855438056
1979	12.052306907915803
1980	12.65093719325451
1981	13.09459974835551
1982	12.987081779148882
1983	13.16985714988961
1984	13.074942703064234
1985	13.50479969712387
1986	13.363389504826587
1987	13.194353665360609
1988	13.700737414034728
1989	14.41345349711918
1990	15.193988661690996
1991	16.869835954866268
1992	16.89834276155395
1993	17.484649309681817
1994	17.54189720784624
1995	17.46183418428314
1996	17.67850528349861
1997	17.5986270430767
1998	17.832952014272472
1999	18.02871250087947
2000	18.866000627888866
2001	19.249671344157306
2002	19.552094348802463
2003	20.106396028618427
2004	20.423619854681156
2005	20.985147626369084
2006	20.320763680752034
2007	19.60687039567919
2008	19.76905205062115
2009	21.3058745458386
2010	20.59315437855765
2011	19.705346688088976
2012	18.33549283760406
2013	18.84809627350317
2014	18.39846455514202
2015	17.85068282061638
2016	17.587877227244338
2017	17.18473868548575
2018	16.977127821058904
2019	16.997278875643023
2020	18.970919338813914
2021	18.693849161944176
2022	17.56358906285739
2023	16.996436194063726