52% (1990)

58% (1989)

45% (1989)

62% (1988)

62% (1989)

59% (1989)

42% (1988)

47% (1988)

39% (1990)

59% (1989)

43% (1992)

48% (1990)

27% (1988)

56% (1987)

62% (1989)

60% (1988)

40% (1986)

28% (1990)

50% (1987)