46% (1983)

47% (1977)

73% (1973)

55% (1980)

59% (1982)

68% (1976)

51% (1978)

47% (1983)

42% (1981)

54% (1978)

49% (1973)

45% (1978)

64% (1976)

43% (1982)

27% (1986)

48% (1982)

40% (1974)

48% (1983)

34% (1977)

10% (1975)