Quarterly Percent
1998-01-01 25.3
1998-04-01 34.6
1998-07-01 16.9
1998-10-01 18.4
1999-01-01 23.3
1999-04-01 28.6
1999-07-01 14.9
1999-10-01 17.8
2000-01-01 24.8
2000-04-01 28.4
2000-07-01 14.1
2000-10-01 17.2
2001-01-01 21.2
2001-04-01 26.6
2001-07-01 13.7
2001-10-01 16.2
2002-01-01 23.5
2002-04-01 28.2
2002-07-01 13.8
2002-10-01 17.2
2003-01-01 23.6
2003-04-01 27.8
2003-07-01 15.8
2003-10-01 18.5
2004-01-01 22.9
2004-04-01 27.5
2004-07-01 14.4
2004-10-01 16.8
2005-01-01 22.1
2005-04-01 27
2005-07-01 13.9
2005-10-01 16.1
2006-01-01 20.9
2006-04-01 26
2006-07-01 12.4
2006-10-01 14.4
2007-01-01 20.4
2007-04-01 21.7
2007-07-01 10.3
2007-10-01 13.4
2008-01-01 17.1
2008-04-01 22.2
2008-07-01 11.2
2008-10-01 14.2
2009-01-01 19.1
2009-04-01 28.3
2009-07-01 16.3
2009-10-01 20.3
2010-01-01 24.7
2010-04-01 27.6
2010-07-01 14.2
2010-10-01 18
2011-01-01 22.8
2011-04-01 25.7
2011-07-01 14.3
2011-10-01 16.2
2012-01-01 21.7
2012-04-01 23.7
2012-07-01 13.7
2012-10-01 16
2013-01-01 22.4
2013-04-01 26.2
2013-07-01 13.4
2013-10-01 16.2
2014-01-01 23.5
2014-04-01 25.6
2014-07-01 13.5
2014-10-01 18.8
2015-01-01 24.6
2015-04-01 29.0
2015-07-01 16.3
2015-10-01 18.2
2016-01-01 23.1
2016-04-01 26.3
2016-07-01 14.2
2016-10-01 15.9
2017-01-01 23.4
2017-04-01 27.4
2017-07-01 14.1
2017-10-01 14.3
2018-01-01 21.1
2018-04-01 21.6