59% (1961)

80% (1957)

80% (1960)

63% (1968)

44% (1973)

73% (1951)

73% (1964)

56% (1956)

78% (1966)

51% (1966)

58% (1969)

60% (1954)

53% (1964)

62% (1968)

65% (1963)

74% (1963)

52% (1958)

54% (1954)

63% (1949)

56% (1964)