78% (1976)

80% (1967)

78% (1973)

64% (1967)

50% (1992)

38% (1966)

46% (1962)

57% (1974)

53% (1965)

69% (1973)

75% (1978)

49% (1976)

53% (1963)

49% (1965)

54% (1962)

71% (1969)

40% (1975)

49% (1961)

45% (1962)

62% (1974)