Year	% of GDP
1966	4.352215050635897
1967	4.7472868486245705
1968	5.191314103604046
1969	5.3946379775110085
1970	10.897866417768338
1971	12.043761843144267
1972	12.455568727092329
1973	12.556167849436356
1974	12.564910233383078
1975	13.154592756306945
1976	12.812166623224378
1977	13.021957634089407
1978	13.155200366664646
1979	17.138063008471615
1980	18.734390303595056
1981	18.977245547304257
1982	19.12761145246275
1983	18.60524161401316
1984	15.300841995671693
1985	14.707617618822951
1986	14.192462740834078
1987	13.21436554665035
1988	12.000638695074699
1989	12.663674452424168
1990	13.705909733216396
1991	13.633719620191076
1992	15.19944513248217
1993	16.79938913904361
1994	17.066773950357728
1995	17.276811080883093
1996	15.014842519083166
1997	13.573118928071274
1998	12.693070117444924
1999	12.865485423456228
2000	13.059381897472273
2001	15.766907185089208
2002	17.23829834115973
2003	17.583428591506138
2004	17.367166387405156
2005	20.464402812800518
2006	22.120025038831233
2007	22.88423191805224
2008	22.297843492810095
2009	22.86669131511051
2010	24.647923532691266
2011	24.124197813289467
2012	23.503562475643115
2013	22.070959735598308
2014	22.53436799104102
2015	23.43982578768724
2016	21.112380446814484
2017	20.81344170627154
2018	20.0113705355786
2019	20.275544672176856
2020	19.740251979382855
2021	21.2861397578073
2022	22.114874043246434
2023	23.32650903973557