Year	% of GDP
1965	3.2845412939046996
1966	3.4303081942304763
1967	3.413873680220208
1968	3.568938977584303
1969	3.8447088772036175
1970	3.6838503649635035
1971	3.7592300846171365
1972	3.9444496501321384
1973	4.002407302541587
1974	4.106808405168973
1975	4.007000229400762
1976	3.9668851556104703
1977	4.2592592592592595
1978	4.023920372028365
1979	3.817240586012872
1980	4.008393816470122
1981	3.8415058691288375
1982	4.0112305798691255
1983	4.3246445497630335
1984	4.610307289902934
1985	5.39003133988752
1986	5.837700093317063
1987	5.856194413127897
1988	6.000832184745013
1989	5.440858528716576
1990	5.759263556896419
1991	6.376362064926777
1992	8.396064811176943
1993	8.320715838845185
1994	8.963125777831307
1995	8.922094216949926
1996	9.025643497928995
1997	8.846648818414833
1998	8.97040003988765
1999	8.869534201078249
2000	8.840859263007
2001	8.69929482753759
2002	8.213423645588245
2003	7.887760015114854
2004	7.763964162019864
2005	7.615216520871648
2006	7.314045290818916
2007	7.168186945524142
2008	7.010904079896231
2009	6.62236712160215
2010	5.94613900034709
2011	5.396920341088659
2012	5.785222833535237
2013	5.750414305531075
2014	5.6121911597602745
2015	5.356055555366098
2016	4.888189625593671
2017	4.855673993865382
2018	4.906474539440159
2019	4.981441388018955
2020	4.474854391635792
2021	4.766037665594863
2022	4.832071914468932
2023	4.571626983476068