75% (1964)

70% (1971)

69% (1960)

80% (1961)

82% (1958)

75% (1957)

56% (1971)

72% (1983)

59% (1959)

72% (1965)

57% (1962)

75% (1963)

59% (1969)

70% (1965)

77% (1964)

60% (1965)

50% (1983)

71% (1974)

63% (1973)

59% (1966)