2002-09-01 100%

2008-05-01 60.4%

2008-08-01 59.6%

2007-07-01 59.3%

2006-03-01 59%

2004-11-01 58.4%

2010-08-01 57.7%

2007-10-01 57.2%

2003-09-01 57.2%

2008-01-01 57%

2013-01-01 57%

2004-02-01 56.9%

2015-02-01 56.9%

2007-01-01 56.9%

2008-06-01 56.8%

2007-09-01 56.6%

2008-02-01 56.5%

2007-03-01 56.5%

2014-04-01 56.4%

2001-08-01 56.3%

2009-02-01 56.3%

2004-06-01 56.3%

2013-02-01 56.2%

1997-04-01 56.1%

2006-08-01 56.1%

2011-09-01 56%

2012-07-01 55.9%

2003-05-01 55.9%

2013-10-01 55.8%

2014-09-01 55.8%

1993-01-01 55.7%

2002-07-01 55.7%

2008-07-01 55.7%

2012-05-01 55.7%

2008-10-01 55.7%

2007-12-01 55.5%

2014-02-01 55.5%

2000-06-01 55.5%

2011-12-01 55.4%

2001-07-01 55.4%

1997-03-01 55.4%

2015-09-02 55.4%

2017-06-01 55.3%

2019-04-04 55.2%

1992-01-01 55.2%

2013-01-02 55.2%

1992-07-01 55.2%

2003-12-01 55.1%

2015-01-04 55.1%

2009-09-01 55.1%