80% (1986)

74% (1986)

68% (1985)

68% (1984)

73% (1986)

63% (1985)

72% (1982)

67% (1985)

72% (1985)

69% (1985)

67% (1985)

68% (1982)

55% (1982)

54% (1985)

71% (1981)

64% (1982)

61% (1981)

58% (1985)

60% (1985)