Year	% of GDP
1968	18.771929824561404
1969	12.616201859229747
1970	20.09987515605493
1971	17.11065573770492
1972	17.19858156028369
1973	16.16883116883117
1974	19.87750556792873
1975	19.51219512195122
1976	21.350210970464133
1977	25.79425113464448
1978	48.91964888588791
1979	40.96281349091957
1980	35.01456966193646
1981	27.989618686364544
1982	26.17783107760836
1983	33.69969290447713
1984	28.58122001370802
1985	24.623052959501557
1986	15.940758062944557
1987	16.49709913394434
1988	22.278014364711115
1989	22.759600461779165
1990	14.548877484408932
1991	14.944612060142182
1992	19.03850474815014
1993	17.402694910352107
1994	16.68178947839634
1995	15.416123694562645
1996	16.332047623577502
1997	16.53613807944557
1998	19.103881802330918
1999	16.67688858810591
2000	23.53978180018039
2001	23.69216593828968
2002	21.411445438326965
2003	19.28869007073076
2004	19.37128698805767
2005	17.351692793324837
2006	16.47375372702135
2007	16.039270308786374
2008	15.697902042272913
2009	15.380769760684728
2010	14.481769906922953
2011	12.895888456166041
2012	11.824547887038527
2013	12.221315916983903
2014	12.595023429491484
2015	12.51467245543789
2016	12.83995746758918
2017	12.830708403685886
2018	13.245867774296519
2019	13.569576922274734
2020	12.263012990069114
2021	13.625556498365407
2022	11.78760222332994