66% (2007)

65% (2009)

67% (2011)

64% (2004)

61% (2011)

70% (2007)

59% (2011)

59% (2009)

50% (2008)

60% (2010)

70% (2011)

58% (2006)

70% (2007)

59% (2008)

56% (2006)

54% (2011)

67% (2003)

63% (2009)

60% (2011)

67% (2010)