Quarterly Percent
1998-04-01 39.8
1998-10-01 38.6
1999-04-01 34.8
1999-10-01 36.1
2000-04-01 31.8
2000-10-01 30.6
2001-04-01 31.1
2001-10-01 32.6
2002-01-01 32.9
2002-04-01 33.9
2002-07-01 34.0
2002-10-01 30.9
2003-01-01 31.5
2003-04-01 32.3
2003-07-01 32.3
2003-10-01 31.6
2004-01-01 31.7
2004-04-01 30.6
2004-07-01 31.3
2004-10-01 34.2
2005-01-01 28.4
2005-04-01 36.3
2005-07-01 31.7
2005-10-01 31.4
2006-01-01 30.6
2006-04-01 35.8
2006-07-01 35.3
2006-10-01 34.2
2007-01-01 33.0
2007-04-01 38.6
2007-07-01 35.1
2007-10-01 36.5
2008-01-01 38.8
2008-04-01 39.3
2008-07-01 37.6
2008-10-01 30.4
2009-01-01 35.6
2009-04-01 33.0
2009-07-01 38.0
2009-10-01 36.9
2010-01-01 37.2
2010-04-01 36.6
2010-07-01 40.4
2010-10-01 34.5
2011-01-01 31.4
2011-04-01 35.0
2011-07-01 33.2
2011-10-01 35.1
2012-01-01 35.8
2012-04-01 37.2
2012-07-01 34.1
2012-10-01 37.2
2013-01-01 33.8
2013-04-01 33.9
2013-07-01 40.0
2013-10-01 36.2
2014-01-01 33.2
2014-04-01 35.2
2014-07-01 35.5
2014-10-01 37.4
2015-01-01 37.9
2015-04-01 36.0
2015-07-01 34.0
2015-10-01 40.6
2016-01-01 37.9
2016-04-01 36.4
2016-07-01 34.2
2016-10-01 35.1
2017-01-01 34.2
2017-04-01 40.7
2017-07-01 38.4
2017-10-01 32.7
2018-01-01 36.8
2018-04-01 36.6