78% (1960)

71% (1980)

78% (1969)

68% (1981)

64% (1959)

54% (1980)

40% (1966)

49% (1964)

53% (1963)

73% (1964)

65% (1963)

55% (1981)

30% (1965)

63% (1960)

90% (1962)

56% (1960)

52% (1964)

70% (1964)

0% (1963)

57% (1960)