52% (1969)

49% (1981)

58% (1983)

56% (1966)

62% (1981)

51% (1966)

66% (1967)

50% (1974)

32% (1981)

32% (1980)

64% (1959)

70% (1955)

40% (1965)

57% (1974)

0% (1966)

45% (1966)

58% (1963)

65% (1969)

45% (1981)

55% (1965)