79% (1960)

54% (1980)

72% (1980)

66% (1959)

68% (1981)

40% (1966)

57% (1981)

30% (1965)

63% (1960)

73% (1964)

65% (1963)

70% (1964)

56% (1963)

56% (1960)

64% (1965)

90% (1962)

47% (1964)

60% (1960)

0% (1963)

52% (1964)