75% (1997)

66% (1997)

73% (1995)

74% (1999)

74% (1998)

54% (1995)

57% (1997)

54% (1999)

66% (1993)

64% (1992)

62% (1997)

52% (1996)

54% (1996)

52% (1997)

67% (1998)

44% (1992)

76% (1994)

54% (1998)

50% (1996)

62% (1993)