1993-01-01 100%

2004-11-01 59.2%

2003-09-01 58.8%

2010-04-01 58.7%

2008-02-01 58.5%

2002-03-01 58.4%

1992-02-01 58%

1992-01-01 57.9%

1996-04-01 57.7%

1997-03-01 57.7%

2008-05-01 57.5%

2003-12-01 57.4%

2014-03-01 57.2%

2008-08-01 57%

2013-01-01 57%

2012-01-01 56.9%

2014-05-01 56.9%

2009-02-01 56.8%

1992-09-01 56.7%

2000-06-01 56.6%

2004-06-01 56.6%

2009-04-01 56.5%

2013-02-01 56.5%

2007-07-01 56.5%

2005-10-01 56.5%

1997-09-01 56.5%

2002-02-01 56.4%

2002-10-01 56.4%

2015-06-02 56.3%

2001-06-01 56.3%

2004-09-01 56.3%

2008-03-01 56.2%

2015-05-01 56.2%

2002-04-01 56.1%

2004-02-01 56%

2013-05-01 56%

1993-02-01 55.9%

2014-02-01 55.7%

2003-07-01 55.7%

2002-09-01 55.7%

2005-01-01 55.6%

2015-11-01 55.6%

1995-12-01 55.5%

2002-07-01 55.5%

2002-06-01 55.5%

2001-05-01 55.5%

2015-01-01 55.3%

2014-07-01 55.3%

1987-03-01 55.3%

2006-03-01 55.3%