75% (2000)

56% (2003)

75% (1995)

69% (1997)

60% (2001)

70% (1995)

70% (2001)

72% (1993)

76% (1994)

63% (2002)

70% (1999)

64% (1999)

61% (2002)

61% (2000)

65% (2001)

55% (1998)

64% (2002)

74% (2002)

72% (2003)

52% (1997)