82% (1991)

74% (1993)

69% (1992)

67% (1992)

65% (1993)

70% (1994)

63% (1992)

59% (1992)

58% (1995)

76% (1991)

75% (1991)

77% (1999)

75% (1992)

66% (1993)

72% (1995)

59% (1992)

63% (2000)

63% (1995)

74% (1998)

75% (1997)