59% (2005)

65% (2000)

65% (2003)

69% (2002)

66% (2004)

67% (2000)

66% (2005)

56% (2006)

60% (2004)

63% (2005)

56% (2007)

65% (2007)

62% (2006)

61% (2008)

65% (1999)

66% (2007)

58% (2006)

61% (2006)

63% (2005)

61% (2003)