61% (1965)

42% (1972)

51% (1962)

62% (1966)

70% (1966)

34% (1964)

54% (1965)

48% (1976)

33% (1975)

45% (1976)

39% (1965)

35% (1966)

60% (1966)

46% (1964)

60% (1965)

58% (1968)

52% (1966)

58% (1978)

75% (1968)

58% (1975)