62% (1966)

59% (1956)

62% (1966)

64% (1965)

63% (1972)

55% (1970)

60% (1967)

58% (1966)

58% (1974)

42% (1970)

50% (1966)

50% (1982)

20% (1968)

0% (1988)

52% (1976)

68% (1967)

43% (1974)

30% (1973)

34% (1976)

48% (1985)