Quarterly Percent
1998-01-01 45.1
1998-04-01 43.8
1998-07-01 43.8
1998-10-01 43.3
1999-01-01 43.6
1999-04-01 42.7
1999-07-01 42.8
1999-10-01 42.6
2000-01-01 43
2000-04-01 42.1
2000-07-01 41.8
2000-10-01 41.4
2001-01-01 41.3
2001-04-01 40.6
2001-07-01 40.4
2001-10-01 40.4
2002-01-01 40.2
2002-04-01 39.4
2002-07-01 39.5
2002-10-01 39.5
2003-01-01 39.6
2003-04-01 38.5
2003-07-01 39.1
2003-10-01 39.1
2004-01-01 35.8
2004-04-01 36.2
2004-07-01 37
2004-10-01 35.5
2005-01-01 36.2
2005-04-01 36.1
2005-07-01 37.4
2005-10-01 35.5
2006-01-01 35.7
2006-04-01 35.2
2006-07-01 36.5
2006-10-01 35.1
2007-01-01 36.7
2007-04-01 36.1
2007-07-01 36
2007-10-01 34.7
2008-01-01 34.6
2008-04-01 34.3
2008-07-01 35.3
2008-10-01 34.7
2009-01-01 35.3
2009-04-01 35.2
2009-07-01 36.3
2009-10-01 34.9
2010-01-01 35.4
2010-04-01 35.1
2010-07-01 36.6
2010-10-01 34.9
2011-01-01 35.3
2011-04-01 35.2
2011-07-01 36.4
2011-10-01 34.4
2012-01-01 33.4
2012-04-01 33
2012-07-01 34.7
2012-10-01 33
2013-01-01 32.9
2013-04-01 33.7
2013-07-01 35.5
2013-10-01 33.5
2014-01-01 33.3
2014-04-01 33.9
2014-07-01 34.8
2014-10-01 32.5
2015-01-01 33.7
2015-04-01 33.7
2015-07-01 35.4
2015-10-01 33.7
2016-01-01 34.0
2016-04-01 32.7
2016-07-01 33.7
2016-10-01 32.5
2017-01-01 32.7
2017-04-01 32.6
2017-07-01 33.0
2017-10-01 32.5
2018-01-01 32.7
2018-04-01 31.6
