Year	% of GDP
1972	16.22327114683115
1973	17.42050009610309
1974	16.337951930124014
1975	20.601154404257475
1976	18.39775425289782
1977	18.755773424635287
1978	18.680814816142068
1979	17.94535890175872
1980	19.046623549746403
1981	20.120586154547492
1982	19.753498564766396
1983	18.843454712441364
1984	20.028187295002027
1985	18.131211580860054
1986	17.979503965043587
1987	16.808316262064242
1988	14.374031744121787
1989	13.940364494897706
1990	13.307384350169505
1991	15.227963065360816
1992	15.742889744910874
1993	16.31458995778633
1994	15.624744207470675
1995	15.100753945570919
1996	16.060542658901422
1997	15.781100956554658
1998	15.771289645010786
1999	15.094957082375204
2000	16.072403628139302
2001	15.913125766803823
2002	16.07306762417313
2003	15.768827267036677
2004	16.42394505505741
2005	18.12088990594516
2006	19.61201732669067
2007	20.37902854121329
2008	18.70926556301475
2009	14.605860565337295
2010	17.471006267209955
2011	18.936095998995658
2012	18.99105955369864
2013	17.458772897195495
2014	17.044501214414957
2015	17.54608292714718
2016	17.468964414004173
2017	17.50579468307662
2018	18.395524498411135
2019	17.71885276885835
2020	16.196169333210758
2021	19.66440473020727
2022	21.273615132807773