56% (1973)

50% (1981)

61% (1965)

72% (1977)

50% (1959)

44% (1972)

52% (1973)

44% (1975)

44% (1974)

56% (1971)

53% (1970)

49% (1981)

50% (1977)

42% (1973)

58% (1979)

42% (1974)

46% (1972)

44% (1971)

50% (1970)

50% (1973)