45% (1976)

62% (1966)

51% (1962)

34% (1964)

48% (1976)

58% (1975)

44% (1984)

61% (1965)

33% (1975)

52% (1966)

46% (1964)

60% (1966)

75% (1965)

60% (1970)

58% (1968)

30% (1965)

60% (1965)

42% (1972)

5% (1981)

70% (1966)