Quarterly Percent
1998-01-01 26.1
1998-04-01 26.2
1998-07-01 26.5
1998-10-01 26.5
1999-01-01 26.6
1999-04-01 26.6
1999-07-01 26.6
1999-10-01 26.5
2000-01-01 26.3
2000-04-01 26.7
2000-07-01 26.1
2000-10-01 26.1
2001-01-01 25.9
2001-04-01 26
2001-07-01 25.6
2001-10-01 25.7
2002-01-01 25.5
2002-04-01 25.5
2002-07-01 25.4
2002-10-01 25.9
2003-01-01 26.1
2003-04-01 26.3
2003-07-01 25.8
2003-10-01 26.1
2004-01-01 26.5
2004-04-01 26.6
2004-07-01 26.7
2004-10-01 26.8
2005-01-01 26.9
2005-04-01 26.9
2005-07-01 26.8
2005-10-01 26.6
2006-01-01 26.6
2006-04-01 26.4
2006-07-01 26.4
2006-10-01 26.5
2007-01-01 26.4
2007-04-01 26.8
2007-07-01 26.3
2007-10-01 26.6
2008-01-01 26.4
2008-04-01 26.5
2008-07-01 26.8
2008-10-01 26.8
2009-01-01 27.4
2009-04-01 27.3
2009-07-01 28.1
2009-10-01 28
2010-01-01 27.8
2010-04-01 28.4
2010-07-01 28.4
2010-10-01 28.2
2011-01-01 27.9
2011-04-01 27.9
2011-07-01 27.7
2011-10-01 28.6
2012-01-01 28.9
2012-04-01 28.5
2012-07-01 28.3
2012-10-01 29.3
2013-01-01 29.8
2013-04-01 29.8
2013-07-01 29.6
2013-10-01 29.8
2014-01-01 30.3
2014-04-01 29.9
2014-07-01 30
2014-10-01 30.3
2015-01-01 30.8
2015-04-01 30.5
2015-07-01 30.4
2015-10-01 29.8
2016-01-01 30.8
2016-04-01 30.2
2016-07-01 29.5
2016-10-01 30.0
2017-01-01 30.1
2017-04-01 29.6
2017-07-01 29.3
2017-10-01 29.3
2018-01-01 29.7
2018-04-01 29.8