59% (2005)

65% (2003)

69% (2002)

65% (1998)

64% (2005)

65% (2000)

55% (2007)

65% (2007)

60% (2004)

57% (2006)

61% (2008)

65% (2005)

65% (2004)

56% (2006)

67% (2000)

63% (2011)

66% (1999)

61% (2006)

61% (2006)

66% (2007)