64% (2010)

62% (2008)

59% (2010)

60% (2009)

59% (2011)

73% (2010)

75% (2007)

69% (2010)

66% (2010)

64% (2005)

56% (2003)

58% (2005)

64% (2004)

45% (2004)

53% (2002)

63% (2008)

56% (2002)

59% (2005)

56% (2009)

50% (2008)