82% (1991)

71% (1994)

70% (1992)

76% (1991)

66% (1993)

74% (1993)

63% (1992)

67% (1992)

64% (1993)

78% (1999)

75% (1992)

73% (1995)

58% (1995)

74% (1999)

72% (1995)

70% (1994)

70% (1998)

64% (1995)

75% (1991)

67% (1993)