62% (1986)

58% (1987)

65% (1987)

57% (1986)

63% (1985)

46% (1987)

60% (1986)

55% (1987)

57% (1989)

57% (1987)

55% (1985)

63% (1982)

47% (1986)

60% (1985)

61% (1984)

70% (1985)

53% (1986)

59% (1984)

63% (1985)

66% (1982)