61% (1965)

51% (1962)

58% (1968)

48% (1976)

34% (1964)

58% (1975)

42% (1972)

54% (1965)

60% (1966)

62% (1966)

52% (1966)

60% (1970)

45% (1976)

23% (1981)

33% (1975)

46% (1964)

44% (1984)

70% (1966)

35% (1966)

58% (1978)