Year	% of GDP
1970	15.034457428814898
1971	16.435280327518125
1972	17.01675549851935
1973	16.3358204207071
1974	15.521196260174284
1975	15.965459896796574
1976	15.385222927968895
1977	15.683242999373695
1978	16.26425863821932
1979	16.342831664376426
1980	16.54971329097858
1981	17.867579116441775
1982	17.941345359881673
1983	18.33869903962863
1984	18.135000991558123
1985	18.28329689677187
1986	17.9779222810668
1987	18.706086312557918
1988	19.101744531819566
1989	18.911365350037084
1990	19.60304247878273
1991	19.691428172199547
1992	19.530409406040896
1993	19.38241068287045
1994	18.691949003795557
1995	17.43477718844916
1996	17.61648430062282
1997	17.68285889607732
1998	17.52846562441032
1999	17.547214205511725
2000	17.73602191326405
2001	18.399833514398185
2002	18.545998845110372
2003	18.975427714138135
2004	19.159358240166245
2005	19.614493578184714
2006	19.483774834692998
2007	19.027645962156743
2008	19.559938777531457
2009	20.678635597432223
2010	20.55298416897777
2011	19.81603339924566
2012	19.808063329854424
2013	19.80720772012399
2014	19.5390135071429
2015	19.110341890410215
2016	19.026566311283943
2017	18.830090738600322
2018	18.880866067303483
2019	18.61866692344106
2020	20.6766657047345
2021	19.411344402812265
2022	19.12646423881081
2023	18.149919851368743