56% (2003)

75% (1995)

74% (2000)

76% (1994)

75% (1998)

74% (2002)

73% (1993)

69% (1997)

69% (2001)

55% (1996)

60% (2001)

70% (1995)

65% (2001)

63% (1999)

62% (2000)

64% (2002)

72% (2003)

63% (2002)

62% (2002)

60% (1995)