64% (1959)

38% (1992)

65% (1969)

65% (1968)

65% (1966)

63% (1958)

64% (1963)

62% (1959)

59% (1964)

61% (1962)

63% (1965)

57% (1963)

64% (1964)

63% (1960)

60% (1960)

64% (1961)

66% (1961)

60% (1970)

61% (1964)

68% (1972)