Quarterly Percent
2000-04-01 60.3
2001-04-01 59.9
2002-04-01 59.2
2003-04-01 57.3
2004-04-01 56.5
2005-01-01 55.4
2005-04-01 54.8
2005-07-01 54.6
2005-10-01 54.3
2006-01-01 54.4
2006-04-01 53.8
2006-07-01 53.2
2006-10-01 53.3
2007-01-01 53.7
2007-04-01 52.8
2007-07-01 52.7
2007-10-01 52.7
2008-01-01 52.9
2008-04-01 52.0
2008-07-01 51.9
2008-10-01 51.7
2009-01-01 51.6
2009-04-01 50.8
2009-07-01 51.1
2009-10-01 50.9
2010-01-01 50.8
2010-04-01 50.5
2010-07-01 50.2
2010-10-01 50.2
2011-01-01 49.9
2011-04-01 49.4
2011-07-01 49.3
2011-10-01 48.9
2012-01-01 48.6
2012-04-01 47.5
2012-07-01 47.1
2012-10-01 46.8
2013-01-01 46.7
2013-04-01 45.9
2013-07-01 45.3
2013-10-01 44.9
2014-01-01 44.9
2014-04-01 44.3
2014-07-01 43.9
2014-10-01 43.4
2015-01-01 43.6
2015-04-01 42.9
2015-07-01 42.4
2015-10-01 42.1
2016-01-01 41.7
2016-04-01 40.9
2016-07-01 40.7
2016-10-01 40.4
2017-01-01 40.3
2017-04-01 39.4
2017-07-01 39.2
2017-10-01 38.8
2018-01-01 38.7
2018-04-01 38.2