Year	% of GDP
1973	25.96183662368009
1974	26.355678138550743
1975	26.603674193153786
1976	27.641710429007915
1977	28.216044070929073
1978	28.555766756258993
1979	28.793142304452164
1980	29.91156389082196
1981	30.551744751287888
1982	31.303359624989394
1983	31.827651944927496
1984	31.891578290477973
1985	32.27225876057062
1986	32.73449244653785
1987	32.9234923313857
1988	32.559152741612245
1989	32.698894703432316
1990	31.92263021474143
1991	33.64402444380737
1992	34.08422176484472
1993	33.811244204913535
1994	33.817607649018264
1995	37.16017641718612
1996	37.60948106211703
1997	37.533670662395345
1998	36.810819694957395
1999	37.139681895558425
2000	36.564168696258434
2001	36.070587396699764
2002	35.59503115073303
2003	35.590205806267804
2004	35.10831711727351
2005	35.28305202153795
2006	35.50986541221588
2007	35.56911628139654
2008	35.62110546450176
2009	35.505631386005646
2010	35.600996562024264
2011	35.782231531841305
2012	35.50027975569772
2013	36.09984402819993
2014	36.099776403502126
2015	35.75258705845654
2016	35.63270808155762
2017	35.65168275875843
2018	35.77853926085443
2019	35.741981999833236
2020	35.78187078694354
2021	36.0169357797772
2022	35.92181805986748