57% (1986)

82% (1976)

74% (1985)

67% (1972)

73% (1983)

45% (1985)

20% (1973)

75% (1980)

67% (1982)

40% (1983)

45% (1979)

80% (1977)

64% (1974)

57% (1976)

70% (1975)

63% (1982)

45% (1981)

57% (1976)

64% (1983)

55% (1982)