Quarterly Percent
1999-04-01 73.1
1999-07-01 72.8
1999-10-01 72.6
2000-01-01 72.6
2000-04-01 72.3
2000-07-01 72.2
2000-10-01 71.6
2001-01-01 70.8
2001-04-01 70.8
2001-07-01 70.4
2001-10-01 70.3
2002-01-01 69.5
2002-04-01 68.6
2002-07-01 68.2
2002-10-01 67.5
2003-01-01 67.1
2003-04-01 65.9
2003-07-01 65.7
2003-10-01 66
2004-01-01 65.8
2004-04-01 65.4
2004-07-01 66.4
2004-10-01 64.6
2005-01-01 63.2
2005-04-01 61.6
2005-07-01 61.8
2005-10-01 60.6
2006-01-01 60.2
2006-04-01 59.2
2006-07-01 60.1
2006-10-01 60.5
2007-01-01 59.4
2007-04-01 58.8
2007-07-01 59.4
2007-10-01 58.3
2008-01-01 58.3
2008-04-01 57.2
2008-07-01 56.4
2008-10-01 57.3
2009-01-01 56.2
2009-04-01 56.3
2009-07-01 55.5
2009-10-01 56.3
2010-01-01 55.1
2010-04-01 53.3
2010-07-01 53.2
2010-10-01 54.9
2011-01-01 53.8
2011-04-01 52.7
2011-07-01 52.8
2011-10-01 52.9
2012-01-01 53.4
2012-04-01 53.1
2012-07-01 53.3
2012-10-01 52.9
2013-01-01 52.0
2013-04-01 51.6
2013-07-01 52.0
2013-10-01 51.0
2014-01-01 51.2
2014-04-01 50.7
2014-07-01 50.8
2014-10-01 50.4
2015-01-01 50.6
2015-04-01 49.9
2015-07-01 49.9
2015-10-01 49.3
2016-01-01 47.7
2016-04-01 48.2
2016-07-01 48.8
2016-10-01 47.6
2017-01-01 46.5
2017-04-01 46.0
2017-07-01 47.5
2017-10-01 45.4
2018-01-01 46.5
2018-04-01 45.8