60% (2005)

65% (2003)

65% (2005)

69% (2002)

65% (2000)

65% (2007)

61% (2006)

63% (1994)

63% (2011)

66% (1999)

63% (2005)

61% (2006)

67% (2000)

61% (2008)

65% (2004)

60% (2003)

59% (2004)

64% (1998)

58% (2006)

55% (2007)