70% (1971)

75% (1964)

69% (1960)

82% (1958)

75% (1957)

50% (1983)

59% (1969)

80% (1961)

72% (1983)

59% (1959)

75% (1963)

72% (1965)

76% (1964)

56% (1971)

57% (1962)

71% (1974)

60% (1965)

63% (1973)

57% (1977)

59% (1966)