69% (2007)

63% (2006)

55% (2005)

41% (2006)

67% (2005)

63% (2010)

60% (2009)

57% (2006)

71% (2005)

59% (2005)

66% (2008)

66% (2007)

58% (2006)

58% (2008)

67% (2008)