49% (1986)

52% (1987)

59% (1986)

37% (1991)

25% (1997)

34% (1986)

44% (1985)

57% (1990)

47% (1986)

50% (1990)

53% (1992)

46% (1985)

47% (1993)

44% (1989)

53% (1988)

52% (1988)

45% (1987)

43% (1995)

50% (1994)

50% (1989)