70% (1967)

66% (1976)

62% (1968)

62% (1968)

63% (1970)

70% (1970)

66% (1972)

56% (1964)

53% (1968)

49% (1967)

57% (1972)

25% (1963)

55% (1965)

65% (1968)

55% (1972)

78% (1969)

54% (1963)

44% (1979)

39% (1964)

63% (1973)