71% (2000)

67% (1998)

78% (1994)

66% (1998)

71% (1994)

63% (1995)

70% (1999)

77% (1997)

69% (1999)

65% (1994)

71% (1995)

53% (1998)

64% (1998)

76% (2003)

65% (1995)

50% (1989)

72% (1998)

63% (1997)

69% (1993)

68% (1994)