56% (2003)

74% (2000)

75% (2002)

74% (2002)

65% (2001)

70% (1995)

69% (2001)

64% (2002)

76% (2002)

70% (1999)

69% (1997)

76% (1994)

75% (1998)

60% (2001)

60% (1995)

73% (1993)

72% (2003)

55% (1996)

48% (1997)

63% (2002)