Year	% of GDP
1972	16.721783114822024
1973	17.114080775879486
1974	17.9661063017273
1975	17.30840451444118
1976	16.60339530226133
1977	17.835784546835328
1978	17.714329696517137
1979	18.597566429531394
1980	19.10470243484512
1981	19.94954227276795
1982	19.726424125445714
1983	17.977797700519368
1984	17.790709510792638
1985	18.240466247935284
1986	17.972408694062906
1987	18.73902597516279
1988	18.382152142353256
1989	18.5506542493415
1990	18.332913357561008
1991	18.32721891304994
1992	17.901804699217603
1993	18.189464615909866
1994	18.327419196379545
1995	18.832354012616552
1996	19.017632816184364
1997	19.517220078153724
1998	19.900218815098526
1999	19.851263235290812
2000	20.600521818177576
2001	19.5645157290092
2002	17.549892105602
2003	16.97274617016832
2004	17.001116357156604
2005	17.979910212440107
2006	18.62043819427882
2007	18.660059144883572
2008	17.705271996042878
2009	15.835430455416109
2010	16.44551110546916
2011	16.65471217238708
2012	16.762474564174163
2013	18.58804904929437
2014	18.69836776378037
2015	18.89764856549763
2016	18.48312773773244
2017	19.1071528212001
2018	17.568990893443075
2019	17.388752884549323
2020	17.88027991658773
2021	18.7585881921754
2022	19.445874094807195