47% (1976)

47% (1975)

66% (1964)

53% (1962)

58% (1963)

61% (1962)

68% (1957)

30% (1983)

59% (1972)

50% (1959)

50% (1982)

30% (1972)

70% (1974)

45% (1964)

51% (1974)

0% (1963)