Year	% of GDP
1960	19.054518241396597
1961	19.156352543573007
1962	18.168162832309854
1963	17.083671662048484
1964	16.507468626225773
1965	16.076281227474254
1966	16.156787140267497
1967	16.83248019073218
1968	16.709751552585367
1969	16.00105363223297
1970	16.71561985114403
1971	15.960556551580417
1972	15.020588314527838
1973	14.874206859810144
1974	14.610053590318358
1975	14.837888309798297
1976	13.96898290394479
1977	27.94337555578135
1978	11.6586472094712
1979	9.77495013627661
1991	7.862396120143685
1992	7.818050407086018
1993	8.29164049726758
1994	8.415585469521906
1995	8.038216242734674
1996	8.504048493429494
1997	8.048158548787967
1998	8.378335158008685
1999	8.264501733790967
2000	8.069374916936162
2001	7.89362669632438
2002	7.523963236477053
2003	7.312919344024822
2004	6.934433062057166
2005	6.854264623188926
2006	6.603484330160436
2007	6.7058083849192816
2008	7.160941145784605
2009	7.403906655712571
2010	6.827997235978349
2011	7.100110136582045
2012	6.7252342407764925
2013	6.668310164914011
2014	6.804247413782518
2015	7.045644059720457
2016	6.9350346165010475
2017	6.7797595601092455
2018	6.885842851440975
2019	6.853031034772384
2020	7.7158463734968
2021	7.12151916027232
2022	7.147352932153779