50% (1992)

70% (1985)

77% (1987)

70% (2003)

73% (1991)

56% (1994)

71% (2001)

30% (1989)

73% (1993)

62% (1993)

69% (1986)

47% (1985)

74% (1991)

50% (1996)

77% (1987)

62% (1986)

66% (1992)

65% (1991)

74% (1993)

100% (1991)