Quarterly Percent
1998-04-01 57.1
1999-04-01 56.9
2000-04-01 58.9
2001-01-01 52.8
2001-04-01 47.8
2001-07-01 45.5
2001-10-01 53.8
2002-01-01 55.1
2002-04-01 49.5
2002-07-01 47.3
2002-10-01 54.2
2003-01-01 56.8
2003-04-01 49.5
2003-07-01 48.3
2003-10-01 56.4
2004-01-01 57
2004-04-01 51.1
2004-07-01 48.4
2004-10-01 55.2
2005-01-01 56.3
2005-04-01 45.5
2005-07-01 47.2
2005-10-01 55.1
2006-01-01 55
2006-04-01 44.7
2006-07-01 45.3
2006-10-01 51.8
2007-01-01 50.9
2007-04-01 46.4
2007-07-01 44.1
2007-10-01 51.5
2008-01-01 51.5
2008-04-01 42.7
2008-07-01 43.6
2008-10-01 51.7
2009-01-01 52.8
2009-04-01 43.5
2009-07-01 46
2009-10-01 53.4
2010-01-01 53.7
2010-04-01 43.3
2010-07-01 44.2
2010-10-01 51
2011-01-01 50.9
2011-04-01 42.1
2011-07-01 43.4
2011-10-01 51
2012-01-01 52.8
2012-04-01 44.3
2012-07-01 44.6
2012-10-01 51.3
2013-01-01 50.3
2013-04-01 42.2
2013-07-01 42.6
2013-10-01 49.4
2014-01-01 48.9
2014-04-01 40.9
2014-07-01 41.9
2014-10-01 48.8
2015-01-01 49.0
2015-04-01 42.8
2015-07-01 43.1
2015-10-01 49.7
2016-01-01 48.4
2016-04-01 40.6
2016-07-01 44.3
2016-10-01 49.9
2017-01-01 49.1
2017-04-01 42.0
2017-07-01 42.7
2017-10-01 49.9
2018-01-01 49.7
2018-04-01 43.4