Year	% of GDP
1970	20.9441327971657
1971	23.282275711159738
1972	24.32672764227642
1973	25.616780784697312
1974	21.780415430267063
1975	19.722514927994382
1976	24.692065310799197
1977	23.49932877325321
1978	22.470389170896784
1979	22.825666795516042
1980	20.850286473470064
1981	23.26104746317512
1982	22.756043161130872
1983	24.961475033117956
1984	25.341629771449085
1985	23.795311819934092
1986	25.610408434420997
1987	24.963205985159746
1988	24.37229992728517
1989	23.523149894895703
1990	21.33408646078264
1991	21.20657653981334
1992	21.849747877704733
1993	25.012119420632573
1994	25.612582781456954
1995	25.526829876553474
1996	24.726758390124726
1997	24.323808615179125
1998	22.14910227847153
1999	23.73331920267776
2000	25.007718689241397
2001	26.58027223568898
2002	25.78320917880471
2003	25.89445128787145
2004	25.56952361234221
2005	23.971228143392846
2006	23.37387502616218
2007	24.896476726682486
2008	22.47605672470777
2009	22.057362833042557
2010	22.47100943238485
2011	22.109092616063467
2012	21.815314445455964
2013	23.74686959024386
2014	23.802323042122133
2015	24.16120784504125
2016	23.902092077963715
2017	24.623698077902066
2018	23.901846341774093
2019	23.917047125280508
2020	22.409083148369472
2021	21.28515736108555
2022	20.734740867134015