Quarterly Percent
1998-04-01 41.0
1998-10-01 39.9
1999-04-01 39.9
1999-10-01 40.0
2000-04-01 39.0
2000-10-01 40.5
2001-04-01 40.9
2001-10-01 42.1
2002-01-01 43.9
2002-04-01 47.5
2002-07-01 46.6
2002-10-01 47.6
2003-01-01 45.2
2003-04-01 45.4
2003-07-01 52.2
2003-10-01 46.7
2004-01-01 52.9
2004-04-01 49.8
2004-07-01 52.4
2004-10-01 51.2
2005-01-01 52.8
2005-04-01 50.6
2005-07-01 54.6
2005-10-01 54.3
2006-01-01 56.6
2006-04-01 56.0
2006-07-01 59.7
2006-10-01 56.8
2007-01-01 60.1
2007-04-01 59.8
2007-07-01 60.4
2007-10-01 62.6
2008-01-01 63.2
2008-04-01 63.5
2008-07-01 62.4
2008-10-01 63.0
2009-01-01 64.2
2009-04-01 66.0
2009-07-01 56.3
2009-10-01 57.1
2010-01-01 56.2
2010-04-01 59.9
2010-07-01 56.6
2010-10-01 54.8
2011-01-01 57.6
2011-04-01 60.2
2011-07-01 59.0
2011-10-01 61.0
2012-01-01 60.1
2012-04-01 63.0
2012-07-01 62.9
2012-10-01 61.4
2013-01-01 59.7
2013-04-01 62.6
2013-07-01 62.2
2013-10-01 60.6
2014-01-01 63.4
2014-04-01 62.8
2014-07-01 61.4
2014-10-01 62.5
2015-01-01 64.8
2015-04-01 64.6
2015-07-01 65.9
2015-10-01 66.6
2016-01-01 67.4
2016-04-01 68.6
2016-07-01 66.3
2016-10-01 68.1
2017-01-01 66.4
2017-04-01 68.1
2017-07-01 67.7
2017-10-01 69.2
2018-01-01 69.1
2018-04-01 71.7