42% (1990)

51% (1987)

57% (1990)

36% (1991)

49% (1987)

47% (1987)

34% (1986)

44% (1989)

52% (1988)

46% (1992)

45% (1985)

48% (1986)

44% (1986)

59% (1986)

22% (1997)

38% (1990)

53% (1988)

48% (1986)

49% (1990)

47% (1993)