59% (1993)

76% (1997)

76% (1996)

74% (1999)

66% (1992)

62% (2002)

74% (2002)

62% (1991)

60% (1997)

64% (1998)

40% (1996)

55% (1995)

64% (2002)

60% (1996)

58% (1995)

70% (1990)

66% (1993)

30% (1992)

55% (1992)

60% (1994)