Year	% of GDP
1972	21.85998942036514
1973	22.16929600619565
1974	21.997264779486077
1975	21.295618565841725
1976	23.664943533800628
1977	22.533029591428182
1978	22.1093717583247
1979	21.96423998975629
1980	24.226882222744607
1981	25.314227907078944
1982	26.384423309562738
1983	27.53525705730489
1984	28.11945001949061
1985	27.205578176372402
1986	27.353541303975703
1987	27.448050085686237
1988	28.751259138882396
1989	25.829153681814333
1990	25.359919186492846
1991	25.629226317111435
1992	25.932385985911292
1993	25.84053316092619
1994	27.056503848905777
1995	26.526589180101663
1996	27.211037028130548
1997	26.87358514634623
1998	26.494328405031435
1999	26.651059972964696
2000	26.34994041077673
2001	24.208238152221426
2002	23.516845782920726
2003	24.160739179045592
2004	25.069723079588062
2005	25.457140237500255
2006	26.81881277460304
2007	25.937168346525
2008	23.810941221499018
2009	22.06237630900189
2010	21.83998658855783
2011	21.842518978674576
2012	22.51982211008793
2013	22.931262638248185
2014	23.07500005780942
2015	18.73239058940225
2016	19.078526100896006
2017	18.202537033095915
2018	18.040388947070298
2019	17.713077230844878
2020	16.200096475506886
2021	17.17203184907568
2022	17.27151797463463