Year	% of GDP
1972	27.266307779037884
1973	29.57129462221424
1974	35.13882289365638
1975	37.38315710309297
1976	40.97093354736855
1977	42.41635107635739
1978	41.111059908836964
1979	46.085192332398904
1980	45.27313924315018
1981	43.91221393011291
1982	50.195928592680986
1983	52.25493743564892
1984	50.262994867414854
1985	45.75475520959063
1986	43.56709459222039
1987	40.82121518538283
1988	35.04785963605072
1989	34.38025279605973
1990	34.013207739840496
1991	24.71188793011806
1992	32.580130037235804
1993	32.70151040433218
1994	32.598961363734574
1995	34.20204475496105
1996	33.8732472914837
1997	35.39324075883361
1998	35.050719746718606
1999	34.596943441441766
2000	36.73675908515068
2001	36.285685365851975
2002	35.719836524487775
2003	34.69280463973464
2004	34.44569557927486
2005	34.679679345569895
2006	35.202967915534124
2007	35.04348587584914
2008	33.03898590866286
2009	30.522917619110814
2010	31.39840792540157
2011	31.381792737294102
2012	30.672653609802175
2013	31.276748719183047
2014	31.603575737021966
2015	31.803065556786386
2016	31.534043428514757
2017	32.96718523566861
2018	31.348110429339965
2019	30.617500991745743
2020	30.200862327147238
2021	32.75673550363909
2022	33.189179568385065