42% (1972)

61% (1965)

60% (1966)

62% (1966)

45% (1976)

34% (1964)

52% (1966)

75% (1968)

60% (1968)

33% (1975)

48% (1964)

48% (1976)

58% (1975)

58% (1968)

51% (1962)

70% (1966)

46% (1964)

58% (1964)

60% (1970)

60% (1965)