Year	% of GDP
1975	14.319057658822173
1976	17.250666956469914
1977	17.773571318006283
1978	18.282331103090733
1979	17.592882741126754
1980	17.545702831847006
1981	17.602736463217365
1982	17.02605425842374
1983	16.53030611729484
1984	16.090920433242772
1985	15.645661983474598
1986	15.02279823054144
1987	15.374676960107406
1988	15.46169595973864
1989	14.697150219644357
1990	14.156591127152717
1991	14.199722656230595
1992	13.43581736553929
1993	12.773689589520194
1994	12.148354445729716
1995	9.5371743164383
1996	9.408272373992402
1997	9.3012224251523
1998	8.93376195310746
1999	8.630085142558322
2000	8.149386959731215
2001	7.745847796917742
2002	7.733646026361625
2003	7.340458228729477
2004	7.209166682182916
2005	6.802585238761094
2006	6.131199352400729
2007	5.742788814189743
2008	5.475393033490068
2009	5.3782676580479025
2010	5.052985883088888
2011	4.600551664750989
2012	4.189968778231059
2013	3.8847924535371994
2014	4.0774878210291154
2015	4.26012306069838
2016	4.570518616568079
2017	4.890401656285345
2018	5.329803629465061
2019	5.453951156916707
2020	5.698649577304141
2021	5.168301198308865
2022	5.237318644922058
2023	5.246814279622763