57% (1971)

62% (1971)

71% (1983)

63% (1971)

66% (1968)

76% (1985)

50% (1979)

65% (1981)

57% (1982)

45% (1970)

60% (1978)

47% (1974)

53% (1971)

55% (1982)

57% (1972)

52% (1973)

50% (1972)

50% (1969)

50% (1980)

72% (1971)