75% (1967)

77% (1979)

73% (1971)

66% (1976)

72% (1975)

69% (2009)

75% (1972)

40% (1969)

64% (1983)

68% (1965)

56% (1989)

67% (1973)

57% (1980)

58% (1967)

76% (1985)

72% (1976)

70% (1990)

0% (1973)

55% (1992)

64% (1973)