84% (2004)

81% (1988)

84% (1997)

79% (1989)

80% (1984)

80% (1986)

78% (1992)

79% (1995)

72% (2002)

65% (1993)

74% (1991)

70% (1999)

78% (1985)

60% (1987)

73% (1993)

77% (2000)

62% (1986)

79% (1988)

68% (1985)

49% (1987)