Year	% of GDP
1970	25.31495731287131
1971	24.8488284874317
1972	24.296028252122102
1973	25.82156149531673
1974	27.142523451483637
1975	26.041974137186735
1976	24.89542932745411
1977	24.781240863525866
1978	24.147106081050886
1979	24.21740366112271
1980	25.66587120438936
1981	25.78314751212308
1982	24.29280946453389
1983	22.94179778975883
1984	22.77784415122362
1985	22.358524395359776
1986	21.581086709749083
1987	21.58349468479107
1988	21.97843943021273
1989	22.024868740101617
1990	22.29222441663377
1991	21.889453405621666
1992	21.330122720921246
1993	19.102922761702963
1994	18.809619143056306
1995	19.372599781106516
1996	19.19718336657989
1997	19.165679581213947
1998	19.48714152736241
1999	19.88084920259082
2000	20.730803522057645
2001	20.72107005952136
2002	21.363399271058313
2003	20.875315087217746
2004	20.96412702718893
2005	21.281654229784206
2006	21.580372809249106
2007	21.660557288716813
2008	21.27787920054193
2009	20.110515991729688
2010	20.024224228274747
2011	19.713871514508092
2012	18.309059446044767
2013	17.204586968864945
2014	16.722168093805255
2015	16.935467014628284
2016	17.17099696730745
2017	17.48077614971109
2018	17.846136979793055
2019	17.98923940882148
2020	17.968916949858773
2021	20.410546020696902
2022	21.65960260352596
2023	21.16839287848194