Quarterly Percent
1998-04-01 66.1
1999-01-01 64.9
1999-04-01 63.2
1999-07-01 65.1
1999-10-01 65.4
2000-01-01 62.3
2000-04-01 63.7
2000-07-01 61.4
2000-10-01 62.6
2001-01-01 64.5
2001-04-01 63.4
2001-07-01 63.8
2001-10-01 63
2002-01-01 62.2
2002-04-01 63.7
2002-07-01 61.5
2002-10-01 62.8
2003-01-01 64.8
2003-04-01 60.6
2003-07-01 60.5
2003-10-01 58.6
2004-01-01 60.3
2004-04-01 59
2004-07-01 59.1
2004-10-01 60.2
2005-01-01 57.6
2005-04-01 56.8
2005-07-01 54.6
2005-10-01 57.4
2006-01-01 57.8
2006-04-01 59.9
2006-07-01 57.5
2006-10-01 54
2007-01-01 53.7
2007-04-01 57.8
2007-07-01 55.3
2007-10-01 55.3
2008-01-01 55.6
2008-04-01 57.2
2008-07-01 55
2008-10-01 54.4
2009-01-01 55.3
2009-04-01 56.1
2009-07-01 54.4
2009-10-01 53.6
2010-01-01 54.2
2010-04-01 51.9
2010-07-01 52.5
2010-10-01 51.1
2011-01-01 53.5
2011-04-01 51.5
2011-07-01 52.3
2011-10-01 51.4
2012-01-01 52.4
2012-04-01 52
2012-07-01 51.6
2012-10-01 52.4
2013-01-01 50.4
2013-04-01 48.6
2013-07-01 48.9
2013-10-01 50.1
2014-01-01 49.5
2014-04-01 47.9
2014-07-01 50.6
2014-10-01 46.9
2015-01-01 48.4
2015-04-01 48.1
2015-07-01 46.7
2015-10-01 48.1
2016-01-01 48.5
2016-04-01 45.0
2016-07-01 45.9
2016-10-01 46.2
2017-01-01 44.5
2017-04-01 44.2
2017-07-01 43.6
2017-10-01 40.2
2018-01-01 41.5
2018-04-01 42.5