63% (2010)

64% (2005)

68% (2011)

65% (2009)

75% (2010)

61% (2006)

73% (2010)

65% (2008)

64% (2006)

75% (2008)

62% (2007)

49% (2004)

67% (2010)

60% (2003)

54% (2011)

51% (2007)

56% (2006)

57% (2006)

56% (2005)

59% (2010)