83% (2005)

83% (2005)

79% (2004)

79% (2002)

69% (2001)

81% (2001)

81% (2005)

76% (1985)

74% (1991)

71% (2006)

55% (2003)

65% (1998)

63% (2006)

64% (1994)

83% (1993)

61% (1990)

71% (1995)

67% (2002)

57% (1988)

70% (1999)