48% (1976)

68% (1957)

66% (1964)

50% (1975)

58% (1972)

30% (1972)

45% (1964)

52% (1962)

56% (1962)

70% (1974)

10% (1983)

51% (1974)

50% (1959)

0% (1963)

50% (1982)