70% (1976)

40% (1999)

74% (1995)

74% (1996)

60% (2001)

65% (2002)

40% (1997)

60% (2004)

76% (2000)

67% (2004)

0% (2003)

69% (1977)

70% (2002)

87% (2003)

77% (2001)

0% (2003)

82% (2002)

69% (1998)

80% (2006)

63% (2003)