62% (1992)

73% (2001)

75% (1996)

54% (1994)

76% (2004)

66% (1992)

57% (1997)

74% (1998)

72% (2002)

70% (1995)

61% (1993)

52% (1997)

60% (1994)

54% (1996)

65% (1997)

62% (1993)

55% (1998)

45% (1998)

67% (1998)

58% (2004)