56% (1991)

51% (1996)

52% (1997)

35% (1997)

30% (1993)

44% (1997)

45% (1993)

45% (1992)

50% (1990)

49% (1993)

33% (1992)

0% (1995)

30% (1996)

38% (1992)

56% (1991)

57% (1990)

47% (1996)

15% (1993)

0% (1991)

0% (1992)