Quarterly Percent
1999-01-01 50.6
2000-01-01 50.2
2000-04-01 49.9
2000-07-01 50.2
2000-10-01 50.8
2001-01-01 50.6
2001-04-01 49.7
2001-07-01 50
2001-10-01 51.2
2002-01-01 51.3
2002-04-01 51
2002-07-01 51.1
2002-10-01 52
2003-01-01 52.4
2003-04-01 52
2003-07-01 51.7
2003-10-01 52.1
2004-01-01 52.2
2004-04-01 52.6
2004-07-01 52
2004-10-01 52.1
2005-01-01 53.1
2005-04-01 52.8
2005-07-01 51.4
2005-10-01 51.9
2006-01-01 53.8
2006-04-01 53.8
2006-07-01 52.7
2006-10-01 53.3
2007-01-01 54.4
2007-04-01 54.1
2007-07-01 53.2
2007-10-01 53.3
2008-01-01 53.9
2008-04-01 53.8
2008-07-01 52.9
2008-10-01 52.9
2009-01-01 53
2009-04-01 53
2009-07-01 52.5
2009-10-01 52.5
2010-01-01 52.8
2010-04-01 52.4
2010-07-01 52
2010-10-01 52.5
2011-01-01 52.6
2011-04-01 52.3
2011-07-01 52
2011-10-01 52
2012-01-01 52.2
2012-04-01 51.9
2012-07-01 51.6
2012-10-01 51.7
2013-01-01 52.3
2013-04-01 52
2013-07-01 51.6
2013-10-01 51.5
2014-01-01 51.3
2014-04-01 51.7
2014-07-01 51.5
2014-10-01 51.5
2015-01-01 51.7
2015-04-01 51.8
2015-07-01 51.4
2015-10-01 51.4
2016-01-01 51.7
2016-04-01 51.6
2016-07-01 51.6
2016-10-01 51.7
2017-01-01 51.6
2017-04-01 51.1
2017-07-01 51.6
2017-10-01 52.0
2018-01-01 51.8
2018-04-01 51.2