64% (2010)

64% (2005)

67% (2011)

73% (2010)

65% (2009)

75% (2010)

75% (2008)

64% (2006)

67% (2010)

65% (2008)

48% (2004)

60% (2003)

40% (2005)

70% (2008)

59% (2010)

59% (2011)

56% (2006)

61% (2003)

55% (2005)

62% (2007)