72% (1992)

71% (2003)

61% (2004)

65% (2003)

76% (2004)

66% (1997)

71% (1991)

53% (2004)

72% (1993)

72% (2004)

60% (2001)

71% (1994)

44% (1994)

66% (1992)

69% (1997)

69% (1996)

65% (2000)

59% (1991)

74% (1996)

63% (2000)