76% (1997)

75% (1995)

58% (1994)

32% (1994)

63% (1994)

51% (1993)

52% (1994)

59% (1996)

45% (1994)

64% (1995)

56% (1994)

37% (1996)

60% (1996)

66% (1995)

72% (1998)

57% (1995)

69% (1993)

50% (1994)

0% (1995)

10% (1997)