62% (1992)

73% (2001)

75% (1996)

76% (2004)

54% (1994)

74% (1998)

66% (1992)

57% (1997)

72% (2002)

60% (1994)

52% (1997)

54% (1996)

62% (1993)

58% (2004)

46% (1998)

55% (1998)

76% (1994)

59% (1996)

65% (1997)

70% (1995)