76% (1997)

51% (1995)

52% (1994)

66% (1995)

58% (1994)

45% (1994)

64% (1995)

70% (1994)

59% (1996)

56% (1994)

57% (1995)

37% (1996)

39% (1996)

50% (1996)

51% (1993)

30% (1994)

43% (1994)

69% (1993)

32% (1994)

0% (1996)