56% (2003)

75% (2000)

75% (1995)

68% (1997)

69% (2001)

76% (1994)

63% (2002)

74% (2002)

61% (2000)

64% (1999)

75% (1998)

55% (1996)

70% (1995)

73% (1993)

72% (2003)

60% (2001)

65% (2001)

70% (1999)

64% (2002)

60% (1995)