Year	% of GDP
1964	0.9384615817751499
1965	1.1021506857729415
1966	1.9814612684894701
1967	1.4677862470534442
1968	1.3583041553456747
1969	1.6581872742293102
1970	2.4065483654420636
1971	2.862798072205093
1972	1.99427319803606
1973	3.502459159936851
1974	5.9860526855272305
1975	3.1083948683427067
1976	2.8795863176210443
1977	5.111964546249591
1978	5.5254774454709015
1979	3.9435374693000416
1980	5.2684508019944465
1981	5.575179432282938
1982	5.911971772696612
1983	5.685742104381648
1984	6.297867360201099
1985	7.5650256363251165
1986	7.748314016236334
1987	7.791006198639026
1988	8.901763905612201
1989	9.12906754834483
1990	6.8533364634602645
1991	5.066286483113433
1992	5.632955023525931
1993	6.285820887396196
1994	9.791387124927137
1995	8.36855986986687
1996	6.746784185400269
1997	8.050868645130176
1998	8.704168352153353
1999	8.285760096841948
2000	8.594325604241035
2001	8.857089399762163
2002	9.142065334859883
2003	8.649787671554598
2004	9.628227515020349
2005	10.10933414235181
2006	11.530983823070946
2007	11.818414694673203
2008	13.199859716175549
2009	10.965523641152245
2010	11.340673547928272
2011	13.056973110027007
2012	15.542836874816976
2013	16.027153570103845
2014	17.390550969411294
2015	20.739644934743094
2016	20.29224696691324
2017	20.42646955794495
2018	21.234467410473453
2019	21.33050952065452
2020	24.918304707739363
2021	25.246102131477567
2022	22.748565830829147
2023	22.64217211188487