52% (2001)

60% (2001)

63% (2006)

65% (2008)

66% (2001)

68% (2006)

54% (2004)

57% (2007)

61% (2011)

58% (2002)

58% (2002)

66% (2001)

55% (2008)

59% (2002)

57% (2003)

63% (2004)

70% (2006)

60% (2003)

55% (2007)

53% (2003)