66% (2012)

67% (2000)

60% (2002)

56% (2007)

58% (2008)

66% (2013)

72% (2005)

66% (2001)

59% (2004)

65% (2008)

65% (2007)

58% (2001)

61% (1997)

63% (2006)

55% (2004)

60% (2005)

60% (2005)

71% (2005)

60% (2002)

56% (2003)