78% (2002)

78% (2008)

69% (2002)

70% (2009)

66% (1999)

65% (2005)

76% (2003)

69% (1997)

57% (2001)

52% (2005)

66% (2001)

70% (2009)

69% (2007)

74% (2004)

64% (2003)

67% (2004)

62% (2007)

63% (2001)

60% (2006)

65% (2003)