Quarterly Percent
1999-01-01 69.1
2000-01-01 68.3
2001-01-01 67.4
2002-01-01 64.4
2003-01-01 61.8
2003-04-01 61.1
2003-07-01 61.5
2003-10-01 60.8
2004-01-01 60.3
2004-04-01 60.3
2004-07-01 60.3
2004-10-01 60.1
2005-01-01 59.4
2005-04-01 59.0
2005-07-01 60.0
2005-10-01 60.1
2006-01-01 59.7
2006-04-01 59.5
2006-07-01 60.3
2006-10-01 60.2
2007-01-01 59.8
2007-04-01 59.3
2007-07-01 60.5
2007-10-01 60.5
2008-01-01 60.8
2008-04-01 60.1
2008-07-01 60.4
2008-10-01 59.7
2009-01-01 59.3
2009-04-01 58.2
2009-07-01 59.2
2009-10-01 58.6
2010-01-01 58.5
2010-04-01 57.7
2010-07-01 57.6
2010-10-01 57.6
2011-01-01 57.4
2011-04-01 56.2
2011-07-01 56.1
2011-10-01 54.8
2012-01-01 54.1
2012-04-01 52.9
2012-07-01 52.4
2012-10-01 51.0
2013-01-01 51.3
2013-04-01 51
2013-07-01 50.8
2013-10-01 50.7
2014-01-01 50.0
2014-04-01 49.4
2014-07-01 49.4
2014-10-01 48.4
2015-01-01 48.2
2015-04-01 46.9
2015-07-01 47.3
2015-10-01 47.3
2016-01-01 46.8
2016-04-01 46.5
2016-07-01 46.1
2016-10-01 46.0
2017-01-01 45.7
2017-04-01 44.9
2017-07-01 45.5
2017-10-01 44.5
2018-01-01 44.2
2018-04-01 44.1