Quarterly Percent
1998-01-01 34.4
1998-04-01 34.7
1998-07-01 35.1
1998-10-01 34.1
1999-01-01 32.1
1999-04-01 32.3
1999-07-01 32.5
1999-10-01 32.7
2000-01-01 32.2
2000-04-01 32.6
2000-07-01 32.9
2000-10-01 33
2001-01-01 29.6
2001-04-01 30.7
2001-07-01 31.3
2001-10-01 30.4
2002-01-01 31
2002-04-01 31.9
2002-07-01 31.5
2002-10-01 30.6
2003-01-01 31.4
2003-04-01 31.5
2003-07-01 30.1
2003-10-01 28.8
2004-01-01 32.7
2004-04-01 32.8
2004-07-01 31.9
2004-10-01 31.3
2005-01-01 31
2005-04-01 30.4
2005-07-01 29.1
2005-10-01 29.3
2006-01-01 30.5
2006-04-01 30
2006-07-01 29.3
2006-10-01 28
2007-01-01 28.9
2007-04-01 29.5
2007-07-01 29.8
2007-10-01 28.2
2008-01-01 27.4
2008-04-01 28.7
2008-07-01 29.1
2008-10-01 27.8
2009-01-01 27.5
2009-04-01 27.5
2009-07-01 28.3
2009-10-01 25.9
2010-01-01 25.1
2010-04-01 24.9
2010-07-01 24.6
2010-10-01 22.1
2011-01-01 20.8
2011-04-01 19.7
2011-07-01 19.4
2011-10-01 17.6
2012-01-01 16.9
2012-04-01 16.5
2012-07-01 15.9
2012-10-01 15.1
2013-01-01 14.3
2013-04-01 14.2
2013-07-01 15
2013-10-01 14.8
2014-01-01 14.1
2014-04-01 15.7
2014-07-01 17.4
2014-10-01 15.9
2015-01-01 15.3
2015-04-01 15.2
2015-07-01 15.4
2015-10-01 14.7
2016-01-01 13.7
2016-04-01 14.2
2016-07-01 15.8
2016-10-01 15.1
2017-01-01 15.1
2017-04-01 16.1
2017-07-01 17.1
2017-10-01 15.2
2018-01-01 15.0
2018-04-01 16.3
