Quarterly Percent
1998-01-01 55.3
1998-04-01 56.1
1998-07-01 56.5
1998-10-01 56
1999-01-01 56
1999-04-01 56
1999-07-01 56.1
1999-10-01 55.5
2000-01-01 55.7
2000-04-01 56.6
2000-07-01 56.9
2000-10-01 56.6
2001-01-01 56.1
2001-04-01 56.5
2001-07-01 56.8
2001-10-01 55.9
2002-01-01 56.1
2002-04-01 57.6
2002-07-01 58
2002-10-01 57.8
2003-01-01 57.9
2003-04-01 58.7
2003-07-01 58.9
2003-10-01 58.5
2004-01-01 58.4
2004-04-01 59.3
2004-07-01 59.4
2004-10-01 59.2
2005-01-01 59.1
2005-04-01 59.8
2005-07-01 59.8
2005-10-01 59.8
2006-01-01 60
2006-04-01 60.6
2006-07-01 61.1
2006-10-01 60.5
2007-01-01 60.2
2007-04-01 61
2007-07-01 61.3
2007-10-01 61
2008-01-01 60.8
2008-04-01 61.8
2008-07-01 61.8
2008-10-01 61.3
2009-01-01 60.6
2009-04-01 61.2
2009-07-01 61.3
2009-10-01 60.3
2010-01-01 59.6
2010-04-01 59.7
2010-07-01 59.3
2010-10-01 57.8
2011-01-01 56.4
2011-04-01 56
2011-07-01 55
2011-10-01 53
2012-01-01 51.8
2012-04-01 51.2
2012-07-01 50.5
2012-10-01 49.7
2013-01-01 48.6
2013-04-01 49.1
2013-07-01 49.1
2013-10-01 48.4
2014-01-01 48.5
2014-04-01 49.4
2014-07-01 50.2
2014-10-01 49.6
2015-01-01 49.2
2015-04-01 51.0
2015-07-01 51.7
2015-10-01 51.3
2016-01-01 50.9
2016-04-01 52.4
2016-07-01 53.0
2016-10-01 51.8
2017-01-01 52.0
2017-04-01 54.0
2017-07-01 54.6
2017-10-01 53.4
2018-01-01 53.3
2018-04-01 55.3