Year	% of GDP
1964	15.976338377339614
1965	16.736869461915834
1966	16.70896262072951
1967	16.346137689868947
1968	18.057659572689438
1969	19.416083406130628
1970	18.85970728656076
1971	18.992226147723947
1972	21.614901084530796
1973	21.798922951536444
1974	18.140927956205413
1975	22.70527578829814
1976	23.228435067697454
1977	25.623151701864487
1981	31.67500500538739
1982	29.93766427153634
1983	29.572157725897792
1984	29.514814932540833
1985	30.603742974371393
1986	33.101469797944134
1987	34.90328313868883
1991	29.819570369820486
1992	21.444270556195917
1993	21.54982201001109
1994	22.7195724836877
1995	24.281738230263578
1996	23.644813269815295
1997	25.42090671867803
1998	28.90833810895129
1999	30.791051708115003
2000	33.32025191729358
2001	34.58182186962799
2002	34.51663726652818
2003	33.672689698199484
2004	31.227113805659137
2005	31.085595651433962
2006	32.651207877231386
2007	33.364357808754114
2008	31.325369361321986
2009	34.47838916014163
2010	38.331338239417924
2011	37.794263218091366
2012	36.51086188111796
2013	34.153817033230375
2014	36.85035066600916
2015	41.01594806111126
2016	45.23923018068088
2018	29.227497445464717
2019	29.214140238933727
2020	33.89210672277409
2021	33.28516043785445