79% (1960)

65% (1959)

30% (1965)

72% (1980)

68% (1981)

54% (1980)

40% (1966)

63% (1960)

56% (1963)

65% (1963)

57% (1981)

90% (1962)

56% (1960)

57% (1960)

74% (1964)

64% (1965)

70% (1964)

0% (1963)

52% (1964)

49% (1964)