83% (1989)

82% (1992)

75% (1999)

71% (1993)

73% (1994)

74% (2000)

77% (1998)

65% (1996)

68% (1997)

50% (1989)

70% (1984)

68% (1996)

70% (2001)

72% (1998)

82% (1994)

0% (1986)

82% (1995)

71% (1998)

73% (1987)

72% (1998)