59% (1956)

63% (1966)

62% (1966)

35% (1975)

63% (1972)

58% (1966)

42% (1970)

58% (1974)

54% (1967)

0% (1969)

48% (1985)

0% (1988)

52% (1976)

0% (1963)

55% (1970)

50% (1966)

68% (1967)

20% (1968)

50% (1982)

30% (1973)