52% (1979)

64% (1989)

50% (1978)

74% (1966)

70% (1979)

61% (1981)

42% (1971)

0% (1981)

0% (1983)

65% (1973)

45% (1970)

61% (1962)

0% (1971)

56% (1985)

62% (1973)

60% (1951)

69% (1982)

50% (1969)

62% (1969)

72% (1982)