76% (1997)

58% (1994)

45% (1994)

56% (1994)

64% (1995)

39% (1996)

57% (1995)

59% (1996)

69% (1993)

52% (1994)

51% (1993)

66% (1995)

32% (1994)

20% (1994)

63% (1994)

66% (1998)

60% (1996)

43% (1994)

51% (1995)

30% (1994)