76% (1964)

70% (1971)

56% (1971)

80% (1961)

72% (1983)

72% (1965)

82% (1958)

75% (1957)

60% (1965)

69% (1960)

59% (1969)

75% (1963)

72% (1958)

75% (1962)

70% (1965)

70% (1982)

64% (1964)

59% (1959)

57% (1977)

50% (1983)