2003-03-01 100%

2005-01-01 58.6%

2007-03-01 57%

2008-05-01 56.8%

2009-04-01 56.4%

2007-01-01 56.3%

1997-03-01 56.3%

2004-03-01 55.9%

2002-12-01 55.7%

2006-12-01 55.7%

2004-06-01 55.7%

2004-02-01 55.3%

2007-11-01 55.3%

2007-06-01 55.3%

2006-06-01 55.1%

2004-10-01 55.1%

2003-12-01 54.9%

2008-06-01 54.9%

2002-11-01 54.9%

1983-01-01 54.7%

2002-06-01 54.7%

2015-05-01 54.7%

2016-09-01 54.7%

2002-02-01 54.5%

2005-02-01 54.5%

2001-10-01 54.5%

2006-02-01 54.3%

2005-03-01 54.3%

2007-04-01 54.1%

2007-12-01 54.1%

2018-07-01 54.1%

2008-03-01 54.1%

2006-03-01 53.9%

2003-05-01 53.9%

1994-11-01 53.9%

2006-11-01 53.9%

2003-07-01 53.7%

2017-06-01 53.7%

2002-09-01 53.7%

2012-09-01 53.7%

1992-04-01 53.5%

2004-04-01 53.5%

2005-06-01 53.5%

2005-10-01 53.5%

2014-09-01 53.5%

2017-09-01 53.5%

2006-08-01 53.3%

2008-02-01 53.3%

2012-05-01 53.3%

2018-09-01 53.3%