Year	% of GDP
1970	12.771902868161003
1971	11.952324134303273
1972	10.152203951185038
1973	10.365191643362396
1974	11.717703111816965
1975	10.147664326549958
1976	10.487158772803276
1977	8.201204141173053
1978	10.181453940518116
1979	10.074384871683364
1980	9.771266456846492
1981	10.305314829282022
1982	9.37172896466501
1983	9.682014919435506
1984	8.467078637467768
1985	8.375972611517428
1986	9.197378415534809
1987	10.16780955730968
1988	11.523159998322443
1989	10.244561973059852