Year	% of GDP
1965	13.018163029389429
1966	12.910989277558254
1967	12.947351452710167
1968	13.079969668498334
1969	13.435767586481479
1970	14.750276612922391
1971	14.603936724278496
1972	14.077709495457436
1973	14.810869217443468
1974	14.829641818555936
1975	15.603190173408944
1976	15.074565993110255
1977	13.884702101745061
1978	13.998499464674252
1979	15.009732351810854
1980	16.105082796894465
1981	17.198116090291013
1982	16.418795252510662
1983	16.74006689238663
1984	16.039225774667678
1985	14.000776088502676
1986	14.9417697372409
1987	16.33021180828942
1988	16.654029414287265
1989	16.939833002359993
1990	16.965766128650788
1991	16.146239021819337
1992	17.767167986834327
1993	16.690982099630926
1994	16.75661544045682
1995	16.82551049666643
1996	16.08741199092279
1997	15.736575835566152
1998	15.473885590290676
1999	14.796431365508955
2000	14.620570172622799
2001	14.729005777446751
2002	14.118435526902957
2003	14.48735867510416
2004	14.416375565256429
2005	13.582253492353669
2006	12.242608836728616
2007	11.89706231661456
2008	11.203130017761254
2009	11.749181887299901
2010	11.355182767400725
2011	10.773961987471232
2012	10.580091579451395
2013	10.180841979122222
2014	10.021525395162351
2015	10.321293341089964
2016	10.672225827433762
2017	10.701092311875872
2018	10.829007206194284
2019	10.729965422702394
2020	10.353062644672825
2021	10.278995129963826
2022	10.396011386691617
2023	9.885073627529081