62% (2003)

45% (2005)

66% (2006)

50% (2006)

53% (2011)

49% (2011)

61% (2003)

40% (2008)

42% (2008)

54% (2005)

55% (2007)

55% (2006)

42% (2003)

55% (2008)

44% (2010)

57% (2006)