71% (1979)

59% (1956)

72% (1964)

74% (1964)

64% (1997)

52% (1982)

72% (1939)

66% (1972)

55% (1972)

63% (1975)

75% (1955)

62% (1960)

76% (1964)

63% (1966)

57% (1949)

69% (1959)

67% (1956)

77% (1960)

50% (1950)

65% (1981)