Year	% of GDP
1970	28.116652419852585
1971	26.83815081122342
1972	25.855206707782774
1973	25.64461919822892
1974	24.473962366473977
1975	20.899141555710575
1976	21.52618544407337
1977	21.272785751153343
1978	21.738964563221895
1979	21.522865790839692
1980	20.285274080776432
1981	19.17953010980777
1982	19.58221667517725
1983	19.726116582752127
1984	20.12964646741644
1985	20.825192781045445
1986	22.413738110885465
1987	21.778898968373593
1988	22.51678922769789
1989	23.385659282490064
1990	24.557967129947517
1991	25.28477739941985
1992	24.75858665381949
1993	23.988657197196854
1994	24.494001257139733
1995	24.733586331751653
1996	23.97672506219488
1997	24.45340743951253
1998	25.249302528767586
1999	24.55605298424845
2000	24.65622614492506
2001	24.587027166358272
2002	25.02665914508762
2003	24.210899948905077
2004	25.039601859873063
2005	24.685553967775345
2006	25.98680128129874
2007	28.15102718489328
2008	27.519762496612987
2009	23.567564694385727
2010	25.328107939479022
2011	26.543384962651658
2012	25.81617376543997
2013	25.81222544329237
2014	26.98872389775332
2015	27.33819534859129
2016	27.344309256908065
2017	28.05115145875929
2018	28.017441946842176
2019	27.806517352645717
2020	27.775881165662376
2021	28.614521278801362
2022	26.99621596106077
2023	27.732919857515846