58% (1967)

36% (1972)

75% (1968)

57% (1950)

76% (1966)

74% (1955)

57% (1972)

90% (1966)

35% (1951)

77% (1958)

40% (1973)

49% (1971)

35% (1952)

44% (1973)

45% (1971)

56% (1961)

72% (1968)

56% (1962)

65% (1962)

60% (1961)