Quarterly Percent
1998-04-01 59.0
1998-10-01 60.1
1999-04-01 60.1
1999-10-01 60.0
2000-04-01 61.0
2000-10-01 59.5
2001-04-01 59.1
2001-10-01 57.9
2002-01-01 56.1
2002-04-01 52.5
2002-07-01 53.4
2002-10-01 52.4
2003-01-01 54.8
2003-04-01 54.6
2003-07-01 47.8
2003-10-01 53.3
2004-01-01 47.1
2004-04-01 50.2
2004-07-01 47.6
2004-10-01 48.8
2005-01-01 47.2
2005-04-01 49.4
2005-07-01 45.4
2005-10-01 45.7
2006-01-01 43.4
2006-04-01 44.0
2006-07-01 40.3
2006-10-01 43.2
2007-01-01 39.9
2007-04-01 40.2
2007-07-01 39.6
2007-10-01 37.4
2008-01-01 36.8
2008-04-01 36.5
2008-07-01 37.6
2008-10-01 37.0
2009-01-01 35.8
2009-04-01 34.0
2009-07-01 43.7
2009-10-01 42.9
2010-01-01 43.8
2010-04-01 40.1
2010-07-01 43.4
2010-10-01 45.2
2011-01-01 42.4
2011-04-01 39.8
2011-07-01 41.0
2011-10-01 39.0
2012-01-01 39.9
2012-04-01 37.0
2012-07-01 37.1
2012-10-01 38.6
2013-01-01 40.3
2013-04-01 37.4
2013-07-01 37.8
2013-10-01 39.4
2014-01-01 36.6
2014-04-01 37.2
2014-07-01 38.6
2014-10-01 37.5
2015-01-01 35.2
2015-04-01 35.4
2015-07-01 34.1
2015-10-01 33.4
2016-01-01 32.6
2016-04-01 31.4
2016-07-01 33.7
2016-10-01 31.9
2017-01-01 33.6
2017-04-01 31.9
2017-07-01 32.3
2017-10-01 30.8
2018-01-01 30.9
2018-04-01 28.3