Quarterly Percent
1998-01-01 57.8
1998-04-01 47.9
1998-07-01 45.2
1998-10-01 57.5
1999-01-01 56.2
1999-04-01 34.9
1999-07-01 42.1
1999-10-01 55.4
2000-01-01 53.5
2000-04-01 35.2
2000-07-01 42.3
2000-10-01 54.6
2001-01-01 54.3
2001-04-01 35.6
2001-07-01 42.9
2001-10-01 54
2002-01-01 55.2
2002-04-01 36.4
2002-07-01 44.8
2002-10-01 55.3
2003-01-01 54.1
2003-04-01 38.1
2003-07-01 44
2003-10-01 58.4
2004-01-01 56.1
2004-04-01 39.8
2004-07-01 45.3
2004-10-01 56.7
2005-01-01 55.7
2005-04-01 39.7
2005-07-01 46.6
2005-10-01 54.4
2006-01-01 53
2006-04-01 39.1
2006-07-01 42.7
2006-10-01 54.7
2007-01-01 54
2007-04-01 37.5
2007-07-01 42.8
2007-10-01 52.8
2008-01-01 53.4
2008-04-01 35
2008-07-01 44.6
2008-10-01 53.3
2009-01-01 54.5
2009-04-01 38.1
2009-07-01 50.5
2009-10-01 58.2
2010-01-01 55.7
2010-04-01 40.1
2010-07-01 49
2010-10-01 57.6
2011-01-01 55.4
2011-04-01 38.3
2011-07-01 47.5
2011-10-01 56.9
2012-01-01 54.1
2012-04-01 38.7
2012-07-01 46.4
2012-10-01 56.1
2013-01-01 56.2
2013-04-01 37.8
2013-07-01 46.9
2013-10-01 56.1
2014-01-01 53.5
2014-04-01 38.5
2014-07-01 48.7
2014-10-01 53.2
2015-01-01 53.2
2015-04-01 37.0
2015-07-01 48.2
2015-10-01 57.4
2016-01-01 53.8
2016-04-01 38.3
2016-07-01 47.9
2016-10-01 55.0
2017-01-01 53.4
2017-04-01 38.2
2017-07-01 44.7
2017-10-01 54.4
2018-01-01 52.7
2018-04-01 39.0