Quarterly Percent
1999-04-01 58.6
2000-01-01 56.2
2000-04-01 56.5
2000-07-01 57.4
2000-10-01 56.3
2001-01-01 57
2001-04-01 56.8
2001-07-01 56.6
2001-10-01 57.6
2002-01-01 57.8
2002-04-01 57.2
2002-07-01 58.5
2002-10-01 56.3
2003-01-01 56
2003-04-01 58.7
2003-07-01 60.7
2003-10-01 60.4
2004-01-01 57.8
2004-04-01 58.3
2004-07-01 58.7
2004-10-01 59.1
2005-01-01 56.7
2005-04-01 58.3
2005-07-01 60.6
2005-10-01 60.3
2006-01-01 61.6
2006-04-01 63.5
2006-07-01 64.5
2006-10-01 64.2
2007-01-01 63.8
2007-04-01 64.5
2007-07-01 65.3
2007-10-01 65
2008-01-01 65.5
2008-04-01 65
2008-07-01 64.6
2008-10-01 64.1
2009-01-01 58.4
2009-04-01 56
2009-07-01 57.7
2009-10-01 54.4
2010-01-01 50.4
2010-04-01 51.4
2010-07-01 56.1
2010-10-01 58.2
2011-01-01 57.6
2011-04-01 58
2011-07-01 61.1
2011-10-01 59.8
2012-01-01 59.1
2012-04-01 59.9
2012-07-01 62.7
2012-10-01 61.9
2013-01-01 61.1
2013-04-01 63.1
2013-07-01 62.9
2013-10-01 61.5
2014-01-01 61.7
2014-04-01 63.9
2014-07-01 63.9
2014-10-01 64.4
2015-01-01 62.9
2015-04-01 65.2
2015-07-01 67.7
2015-10-01 64.8
2016-01-01 63.3
2016-04-01 65.8
2016-07-01 67.0
2016-10-01 65.0
2017-01-01 65.9
2017-04-01 66.3
2017-07-01 67.8
2017-10-01 67.9
2018-01-01 65.7
2018-04-01 67.7