76% (1997)

45% (1994)

56% (1994)

57% (1995)

51% (1993)

52% (1994)

58% (1994)

64% (1995)

59% (1996)

66% (1995)

51% (1995)

0% (1995)

32% (1994)

30% (1994)

50% (1996)

37% (1996)

39% (1996)

10% (1997)

69% (1993)

43% (1994)