67% (1972)

67% (1982)

83% (1977)

50% (1983)

57% (1976)

75% (1980)

67% (1978)

63% (1982)

82% (1976)

64% (1983)

45% (1985)

64% (1974)

20% (1973)

55% (1982)

50% (1983)

70% (1977)

59% (1982)

57% (1976)

45% (1984)

74% (1985)