Quarterly Percent
1998-04-01 47.6
1999-04-01 47.5
2000-04-01 48.7
2001-04-01 45.5
2002-04-01 46.8
2003-04-01 44.6
2004-04-01 44
2005-04-01 42.3
2006-04-01 41.4
2007-04-01 39.7
2008-04-01 38.4
2009-04-01 39
2010-01-01 40.3
2010-04-01 40.7
2010-07-01 42.1
2010-10-01 40.9
2011-01-01 39.5
2011-04-01 39.2
2011-07-01 40.2
2011-10-01 38.7
2012-01-01 38.6
2012-04-01 37.4
2012-07-01 38.0
2012-10-01 38.6
2013-01-01 36.9
2013-04-01 35.6
2013-07-01 36.9
2013-10-01 37.6
2014-01-01 37.0
2014-04-01 34.8
2014-07-01 35.9
2014-10-01 35.8
2015-01-01 34.8
2015-04-01 34.3
2015-07-01 33.3
2015-10-01 32.6
2016-01-01 32.3
2016-04-01 31.5
2016-07-01 32.5
2016-10-01 32.0
2017-01-01 33.2
2017-04-01 32.1
2017-07-01 31.8
2017-10-01 30.8
2018-01-01 30.8
2018-04-01 30.9
