Year	% of GDP
1970	27.847094399730114
1971	26.970865501027212
1972	26.744280027300764
1973	26.989758108378215
1974	26.33637699152237
1975	23.80696471240668
1976	23.912657921700614
1977	23.422259977639982
1978	23.67598443647957
1979	23.38178480740437
1980	22.44095571351471
1981	21.242602184537134
1982	21.168796037712912
1983	21.295847131485782
1984	21.975699368510718
1985	21.958382053346316
1986	22.708718348792473
1987	22.130939104357378
1988	23.04719016848725
1989	23.535076244268176
1990	23.677237190686
1991	23.462807883947445
1992	22.617035678954313
1993	22.25457963298984
1994	23.007953730633375
1995	23.89158571764883
1996	23.48388371977913
1997	24.01878553365625
1998	24.477084984883845
1999	24.265594971927364
2000	24.406564384810448
2001	24.451085501695655
2002	24.381985617335527
2003	23.91452844908518
2004	24.365476110650572
2005	24.08028973546969
2006	24.785397211174224
2007	25.714963805438824
2008	24.866155592912147
2009	22.263302781943707
2010	22.764148388114393
2011	23.394605348273384
2012	23.14262244585345
2013	23.391958083536434
2014	24.079114307659225
2015	25.118456386223855
2016	25.31987936136735
2017	25.80576607590442
2018	26.007903226438085
2019	26.394786179132414
2020	26.103432349341283
2021	27.261744454864544
2022	26.517484750349052
2023	26.665428837888054