Quarterly Percent
1999-04-01 54.3
2000-04-01 52.5
2001-04-01 52
2002-04-01 52.6
2003-04-01 54.5
2004-04-01 57.2
2005-01-01 60
2005-04-01 60.9
2005-07-01 61.8
2005-10-01 62.3
2006-01-01 62.2
2006-04-01 63.4
2006-07-01 64.1
2006-10-01 65
2007-01-01 64.7
2007-04-01 66.2
2007-07-01 65.9
2007-10-01 66.4
2008-01-01 66.1
2008-04-01 67.7
2008-07-01 67.2
2008-10-01 67.8
2009-01-01 68.2
2009-04-01 69.6
2009-07-01 68.8
2009-10-01 70.4
2010-01-01 71.1
2010-04-01 70.9
2010-07-01 70.2
2010-10-01 71.1
2011-01-01 71.1
2011-04-01 72.1
2011-07-01 71.5
2011-10-01 72.5
2012-01-01 72.3
2012-04-01 72.5
2012-07-01 73.6
2012-10-01 73.9
2013-01-01 73.4
2013-04-01 74.1
2013-07-01 74.8
2013-10-01 75.6
2014-01-01 75.6
2014-04-01 75
2014-07-01 75.5
2014-10-01 75.9
2015-01-01 74.8
2015-04-01 74.5
2015-07-01 75.6
2015-10-01 76.1
2016-01-01 76.3
2016-04-01 76.6
2016-07-01 76.9
2016-10-01 77.7
2017-01-01 76.3
2017-04-01 77.9
2017-07-01 78.4
2017-10-01 78.9
2018-01-01 77.9
2018-04-01 78.1