73% (1981)

55% (1987)

80% (1976)

69% (1985)

60% (1984)

63% (1988)

82% (1979)

56% (1982)

76% (1980)

71% (1967)

45% (1983)

20% (1984)

50% (1971)

73% (1966)

48% (1971)

73% (1965)

60% (1982)

73% (1968)

64% (1982)

74% (1984)