Year	% of GDP
1970	0.187695516162669
1971	0.217083529966966
1972	0.24885145482388998
1973	0.21874076263671302
1974	0.24222222222222203
1975	0.30049786628734
1976	0.39615076182838804
1977	0.507575757575758
1978	0.8730950007121491
1979	0.938856941673513
1980	0.862051438446681
1981	0.919420509421456
1982	1.15496779857107
1984	1.22260793484156
1985	1.13315792450674
1986	1.04396175427768