77% (1976)

81% (1967)

57% (1974)

40% (1973)

53% (1962)

46% (1962)

79% (1973)

75% (1978)

49% (1976)

55% (1970)

50% (1966)

40% (1975)

50% (1965)

53% (1963)

69% (1973)

50% (1963)

45% (1967)

49% (1967)

64% (1974)

50% (1968)