Year	% of GDP
1960	15.567567432929147
1961	15.176983252651372
1962	16.45541688466838
1963	21.268059458952667
1964	16.330028521577464
1965	16.576576576576578
1966	14.933777306916774
1967	14.206586826347307
1968	14.661175675946318
1969	15.325294305142886
1970	15.374298240380282
1971	14.950523311132255
1972	18.512442396313364
1973	16.46679081315953
1974	11.927360774818402
1975	15.454368512110728
1976	18.55138367403699
1977	19.319762387713705
1978	21.075482195845694
1979	19.05522804840211
1980	16.91937624415207
1981	16.888518342055743
1982	16.915299857000168
1983	18.351930666253967
1984	17.63552242642334
1985	20.49830056647784
1986	23.468482226181386
1987	24.40636721869291
1988	21.120304677824713
1989	19.124372894047173
1990	16.33851659879057
1991	18.81228263201507
1992	16.311864131976815
1993	15.501946643672754
1994	14.010153111539209
1995	14.502262443438916
1996	14.445790991485854
1997	15.059727895532468
1998	17.37561436672968
1999	15.528387321490769
2000	14.614128928551631
2001	14.930927408000155
2002	15.540085802911593
2003	14.961406013819051
2004	15.127593878461473
2005	16.276362896510967
2006	17.42543002356451
2007	16.953646005529745
2008	16.129499071394488
2009	20.329566843420732
2010	19.66075524388885
2011	20.702300529506374
2012	22.28697199967442
2013	24.931558445984475
2014	23.470190374379378
2015	24.89688445511113
2016	24.454710467156353
2017	19.362416367948498
2018	23.86971561541165
2019	22.927591054830128