53% (1976)

52% (1962)

46% (1986)

44% (1973)

70% (1968)

62% (1971)

58% (1976)

69% (1963)

53% (1973)

35% (1972)

59% (1973)

51% (1968)

60% (1965)

53% (1971)

63% (1970)

64% (1972)

53% (1970)

59% (1968)

48% (1966)

47% (1966)