65% (2003)

71% (2003)

66% (1997)

53% (2004)

71% (1991)

72% (1992)

56% (1994)

72% (1993)

61% (2004)

62% (1994)

69% (1997)

76% (2004)

59% (1991)

65% (2000)

74% (1996)

50% (1993)

72% (1994)

72% (2004)

60% (2001)

63% (2000)