56% (1975)

68% (1971)

71% (1977)

61% (1972)

55% (1976)

56% (1972)

72% (1944)

62% (1974)

39% (1968)

66% (1970)

46% (1969)

62% (1974)

60% (1972)

62% (1975)

30% (1982)

65% (1976)

53% (1971)

45% (1974)

65% (1970)

58% (1971)