37% (1991)

38% (1990)

33% (1990)

47% (1991)

45% (1990)

52% (1988)

57% (1991)

35% (1990)

45% (1990)

45% (1989)

73% (1991)

10% (1993)

25% (1992)

45% (1990)

52% (1989)

55% (1990)

15% (1991)

50% (1992)