Year	% of GDP
1970	9.869989440298722
1971	10.042351859942926
1972	9.925463773087529
1973	9.912071223209724
1974	10.319524168761014
1975	10.898485206896769
1976	11.772907175538757
1977	11.98721302639238
1978	12.42853526852805
1979	12.951840633711079
1980	13.605259797423757
1981	14.541111983773602
1982	14.71577032004466
1983	15.154925909909208
1984	14.917353872938497
1985	15.185952962728116
1986	14.99076456851044
1987	15.487144119596127
1988	15.335116337597436
1989	15.835150137726698
1990	16.2488727076589
1991	16.92094059987902
1992	17.805721901530877
1993	18.345183890159856
1994	17.761871561029334
1995	17.61378933016058
1996	17.48721900724239
1997	17.00663241332029
1998	16.85776619489814
1999	16.79052176934582
2000	16.697820949570193
2001	16.54467305664964
2002	16.62433026661259
2003	16.77660526558523
2004	17.168914068163225
2005	17.331620939940066
2006	17.360331452855732
2007	17.705634105318357
2008	18.823098921085386
2009	20.63969446088787
2010	20.63290230621725
2011	20.671709769939355
2012	19.97732527465707
2013	19.906493435239554
2014	19.67184062102947
2015	19.517536536770518
2016	19.100787853771468
2017	18.663440264535154
2018	18.714400938980397
2019	18.861946844392634
2020	22.014637938892413
2021	21.23170442366378
2022	20.368217817149283
2023	19.94864179154505