62% (2003)

65% (2004)

72% (2001)

71% (2004)

75% (2003)

50% (2006)

66% (1998)

61% (2001)

59% (2004)

61% (2006)

59% (2006)

66% (2007)

65% (2002)

59% (2003)

60% (2001)

59% (2001)

51% (2004)

65% (2003)

54% (2008)

59% (2004)