Quarterly Percent
1998-01-01 76.8
1998-04-01 77.1
1998-07-01 77.3
1998-10-01 77.2
1999-01-01 78.1
1999-04-01 78.1
1999-07-01 77.8
1999-10-01 77.6
2000-01-01 77.9
2000-04-01 78.3
2000-07-01 78.3
2000-10-01 78
2001-01-01 78.2
2001-04-01 77.9
2001-07-01 77.8
2001-10-01 77.6
2002-01-01 77.9
2002-04-01 78.9
2002-07-01 79.1
2002-10-01 79.2
2003-01-01 79.4
2003-04-01 79.7
2003-07-01 80.1
2003-10-01 80
2004-01-01 80.8
2004-04-01 81.2
2004-07-01 81.4
2004-10-01 81.2
2005-01-01 81.2
2005-04-01 81.6
2005-07-01 81.5
2005-10-01 81.6
2006-01-01 81.6
2006-04-01 81.9
2006-07-01 82.3
2006-10-01 82
2007-01-01 81.8
2007-04-01 81.9
2007-07-01 81.9
2007-10-01 81.7
2008-01-01 81.9
2008-04-01 82.1
2008-07-01 82
2008-10-01 81.8
2009-01-01 82.3
2009-04-01 82.8
2009-07-01 83
2009-10-01 82.9
2010-01-01 83.1
2010-04-01 83.5
2010-07-01 83.3
2010-10-01 83.1
2011-01-01 83
2011-04-01 82.9
2011-07-01 83.2
2011-10-01 83.4
2012-01-01 83.5
2012-04-01 83.7
2012-07-01 83.9
2012-10-01 83.9
2013-01-01 83.6
2013-04-01 84.2
2013-07-01 84.1
2013-10-01 83.6
2014-01-01 84.1
2014-04-01 84.4
2014-07-01 84.6
2014-10-01 84.3
2015-01-01 84.6
2015-04-01 85.4
2015-07-01 85.9
2015-10-01 85.6
2016-01-01 85.5
2016-04-01 85.8
2016-07-01 85.8
2016-10-01 84.8
2017-01-01 84.7
2017-04-01 85.5
2017-07-01 85.2
2017-10-01 84.6
2018-01-01 84.5
2018-04-01 85.3