Quarterly Percent
1999-04-01 58.9
1999-07-01 59.3
1999-10-01 58.5
2000-01-01 57.8
2000-04-01 57.4
2000-07-01 56.9
2000-10-01 56.5
2001-01-01 56.3
2001-04-01 56.1
2001-07-01 56.1
2001-10-01 55.6
2002-01-01 55.2
2002-04-01 54.4
2002-07-01 54.3
2002-10-01 53.7
2003-01-01 53.6
2003-04-01 52.8
2003-07-01 52.4
2003-10-01 52.3
2004-01-01 52.4
2004-04-01 51.8
2004-07-01 52.6
2004-10-01 51.8
2005-01-01 51.3
2005-04-01 51
2005-07-01 51.2
2005-10-01 51
2006-01-01 50.4
2006-04-01 49.9
2006-07-01 49.6
2006-10-01 49.5
2007-01-01 49.8
2007-04-01 50.1
2007-07-01 50.4
2007-10-01 49.9
2008-01-01 50
2008-04-01 50
2008-07-01 50.0
2008-10-01 49.2
2009-01-01 49.4
2009-04-01 49.2
2009-07-01 49.5
2009-10-01 49.3
2010-01-01 48.7
2010-04-01 49.4
2010-07-01 48.3
2010-10-01 49.1
2011-01-01 48.8
2011-04-01 49
2011-07-01 48.4
2011-10-01 48.7
2012-01-01 47.6
2012-04-01 47
2012-07-01 47.3
2012-10-01 46.2
2013-01-01 45.5
2013-04-01 44.9
2013-07-01 44.5
2013-10-01 44.0
2014-01-01 43.7
2014-04-01 43.6
2014-07-01 44.0
2014-10-01 43.1
2015-01-01 42.6
2015-04-01 42.9
2015-07-01 42.0
2015-10-01 41.7
2016-01-01 41.1
2016-04-01 40.3
2016-07-01 41.1
2016-10-01 40.5
2017-01-01 39.7
2017-04-01 39.6
2017-07-01 38.9
2017-10-01 38.2
2018-01-01 37.7
2018-04-01 37.7