56% (2003)

75% (2000)

75% (1995)

69% (1997)

76% (1994)

75% (1998)

74% (2002)

64% (2002)

65% (2001)

61% (2000)

70% (1995)

72% (1993)

60% (2001)

69% (2001)

55% (1996)

64% (2002)

48% (1997)

63% (1999)

70% (1999)

60% (1995)