58% (1983)

59% (1983)

64% (1982)

60% (1982)

66% (1984)

42% (1988)

64% (1986)

72% (1982)

52% (1983)

70% (1985)

63% (1984)

42% (1982)

59% (1982)

77% (1984)

52% (1984)

67% (1987)

56% (1981)

40% (1981)

57% (1983)

52% (1986)