61% (2001)

62% (2003)

59% (2004)

51% (2006)

72% (2001)

65% (2004)

59% (2006)

60% (2003)

59% (2001)

64% (2001)

66% (2002)

75% (2003)

70% (2004)

58% (2004)

61% (2006)

65% (2003)

66% (1998)

65% (2007)

65% (2002)

54% (2008)