59% (1982)

67% (1972)

50% (1983)

63% (1982)

70% (1975)

64% (1983)

57% (1976)

70% (1977)

60% (1975)

74% (1985)

65% (1975)

45% (1979)

67% (1982)

20% (1973)

73% (1983)

75% (1980)

45% (1981)

64% (1974)

83% (1977)

57% (1974)