77% (1996)

65% (1995)

66% (1997)

65% (1996)

59% (1996)

61% (1998)

70% (1996)

61% (1997)

61% (1996)

53% (1997)

53% (1996)

62% (1996)

60% (1997)

53% (1997)

34% (1997)

64% (1997)

69% (1997)

58% (1996)

63% (1995)

52% (1995)