Quarterly Percent
1998-01-01 57.0
1998-04-01 57.8
1998-07-01 57.4
1998-10-01 57.6
1999-01-01 57.6
1999-04-01 57.9
1999-07-01 58
1999-10-01 58.1
2000-01-01 58.3
2000-04-01 58.5
2000-07-01 58.8
2000-10-01 58.9
2001-01-01 59
2001-04-01 59.1
2001-07-01 59.1
2001-10-01 59.2
2002-01-01 59.1
2002-04-01 59.2
2002-07-01 59.1
2002-10-01 58.2
2003-01-01 58.2
2003-04-01 58.2
2003-07-01 58.1
2003-10-01 57.8
2004-01-01 57.6
2004-04-01 57.7
2004-07-01 57.5
2004-10-01 57.4
2005-01-01 57
2005-04-01 57.4
2005-07-01 57.2
2005-10-01 57.1
2006-01-01 57.1
2006-04-01 57.6
2006-07-01 57.6
2006-10-01 57
2007-01-01 57
2007-04-01 57.2
2007-07-01 57.6
2007-10-01 57.3
2008-01-01 57.4
2008-04-01 57.7
2008-07-01 57.3
2008-10-01 57
2009-01-01 56.2
2009-04-01 55.9
2009-07-01 55.1
2009-10-01 55.1
2010-01-01 55.1
2010-04-01 54.8
2010-07-01 54.5
2010-10-01 54.2
2011-01-01 53.2
2011-04-01 53.5
2011-07-01 53
2011-10-01 51.6
2012-01-01 51.2
2012-04-01 51.4
2012-07-01 51
2012-10-01 49.6
2013-01-01 48.8
2013-04-01 49.6
2013-07-01 50.2
2013-10-01 50.2
2014-01-01 49.8
2014-04-01 50.8
2014-07-01 51.4
2014-10-01 50.6
2015-01-01 50.5
2015-04-01 51.7
2015-07-01 51.6
2015-10-01 51.5
2016-01-01 50.9
2016-04-01 51.9
2016-07-01 52.6
2016-10-01 52.4
2017-01-01 52.6
2017-04-01 53.8
2017-07-01 54.3
2017-10-01 54.3
2018-01-01 54.3
2018-04-01 55.1