60% (1972)

69% (1972)

69% (1971)

62% (1966)

63% (1971)

59% (1981)

64% (1965)

65% (1974)

57% (1974)

57% (1965)

62% (1974)

54% (1977)

51% (1976)

59% (1965)

64% (1973)

53% (1970)

55% (1971)

42% (1966)

60% (1967)

50% (1967)