83% (2005)

69% (2001)

84% (2005)

80% (2004)

81% (2005)

80% (2002)

81% (2001)

70% (1995)

64% (1994)

66% (1999)

65% (1998)

56% (2003)

75% (1991)

76% (1985)

83% (1993)

72% (2006)

63% (2006)

68% (1995)

0% (1995)

60% (1992)