50% (1955)

61% (1997)

74% (1951)

70% (1983)

79% (1950)

74% (1965)

76% (1959)

65% (1960)

80% (1974)

70% (1959)

68% (1950)

35% (1958)

65% (1958)

55% (1952)

56% (1956)

48% (1970)

78% (1966)

59% (1957)

65% (1966)

72% (1965)