Quarterly Percent
1998-04-01 62.7
1999-04-01 64.6
2000-04-01 64.3
2001-01-01 65.8
2001-04-01 66.2
2001-07-01 67.3
2001-10-01 67.5
2002-01-01 67.4
2002-04-01 68.3
2002-07-01 68.2
2002-10-01 68.2
2003-01-01 67.9
2003-04-01 68.6
2003-07-01 69
2003-10-01 68.7
2004-01-01 68.5
2004-04-01 69
2004-07-01 69.5
2004-10-01 69.5
2005-01-01 69.4
2005-04-01 68.9
2005-07-01 69.7
2005-10-01 70.1
2006-01-01 70.3
2006-04-01 69.5
2006-07-01 69.3
2006-10-01 69.4
2007-01-01 69.1
2007-04-01 69.9
2007-07-01 70.6
2007-10-01 70.2
2008-01-01 69.6
2008-04-01 70.4
2008-07-01 70.3
2008-10-01 70
2009-01-01 69.8
2009-04-01 69.6
2009-07-01 70
2009-10-01 70.5
2010-01-01 69.9
2010-04-01 70.2
2010-07-01 70.8
2010-10-01 71
2011-01-01 71.2
2011-04-01 72.2
2011-07-01 72.1
2011-10-01 72.6
2012-01-01 72.1
2012-04-01 73
2012-07-01 73.2
2012-10-01 73.5
2013-01-01 72.7
2013-04-01 73.3
2013-07-01 73.9
2013-10-01 74.4
2014-01-01 73.5
2014-04-01 74.4
2014-07-01 74
2014-10-01 74
2015-01-01 74.1
2015-04-01 74.4
2015-07-01 74.4
2015-10-01 74.9
2016-01-01 74.5
2016-04-01 75.5
2016-07-01 76.1
2016-10-01 75.8
2017-01-01 75.8
2017-04-01 76.7
2017-07-01 76.8
2017-10-01 76.4
2018-01-01 77.2
2018-04-01 77.7