Quarterly Percent
1999-01-01 76.4
2000-01-01 77
2000-04-01 77.1
2000-07-01 76.1
2000-10-01 75.7
2001-01-01 76
2001-04-01 77
2001-07-01 76.5
2001-10-01 75.5
2002-01-01 75.6
2002-04-01 76.2
2002-07-01 76.1
2002-10-01 75.2
2003-01-01 75.6
2003-04-01 76.2
2003-07-01 75.7
2003-10-01 75.5
2004-01-01 76.1
2004-04-01 75.9
2004-07-01 75.8
2004-10-01 76.2
2005-01-01 75.7
2005-04-01 76
2005-07-01 76.9
2005-10-01 77.1
2006-01-01 75.1
2006-04-01 75
2006-07-01 76
2006-10-01 75.5
2007-01-01 74.6
2007-04-01 75.5
2007-07-01 76.1
2007-10-01 76.2
2008-01-01 75.3
2008-04-01 75.7
2008-07-01 76.9
2008-10-01 77.2
2009-01-01 76.9
2009-04-01 77.3
2009-07-01 77.6
2009-10-01 78
2010-01-01 78.3
2010-04-01 78.9
2010-07-01 78.6
2010-10-01 78.5
2011-01-01 78.7
2011-04-01 78.6
2011-07-01 78.5
2011-10-01 78.9
2012-01-01 78.9
2012-04-01 79.1
2012-07-01 79.3
2012-10-01 79.2
2013-01-01 78.6
2013-04-01 78.8
2013-07-01 79.4
2013-10-01 79.6
2014-01-01 79.8
2014-04-01 79.1
2014-07-01 79.6
2014-10-01 80.1
2015-01-01 79.7
2015-04-01 79.6
2015-07-01 79.5
2015-10-01 79.5
2016-01-01 79.2
2016-04-01 79.2
2016-07-01 79.0
2016-10-01 78.5
2017-01-01 79.0
2017-04-01 79.4
2017-07-01 78.3
2017-10-01 78.3
2018-01-01 79.0
2018-04-01 79.4