Quarterly Percent
1999-04-01 45.7
2000-04-01 47.5
2001-04-01 48
2002-04-01 47.4
2003-04-01 45.5
2004-04-01 42.8
2005-01-01 40
2005-04-01 39.1
2005-07-01 38.2
2005-10-01 37.7
2006-01-01 37.8
2006-04-01 36.6
2006-07-01 35.9
2006-10-01 35
2007-01-01 35.3
2007-04-01 33.8
2007-07-01 34.1
2007-10-01 33.6
2008-01-01 33.9
2008-04-01 32.3
2008-07-01 32.8
2008-10-01 32.2
2009-01-01 31.8
2009-04-01 30.4
2009-07-01 31.2
2009-10-01 29.6
2010-01-01 28.9
2010-04-01 29.1
2010-07-01 29.8
2010-10-01 28.9
2011-01-01 28.9
2011-04-01 27.9
2011-07-01 28.5
2011-10-01 27.5
2012-01-01 27.7
2012-04-01 27.5
2012-07-01 26.4
2012-10-01 26.1
2013-01-01 26.6
2013-04-01 25.9
2013-07-01 25.2
2013-10-01 24.4
2014-01-01 24.4
2014-04-01 25
2014-07-01 24.5
2014-10-01 24.1
2015-01-01 25.2
2015-04-01 25.5
2015-07-01 24.4
2015-10-01 23.9
2016-01-01 23.7
2016-04-01 23.4
2016-07-01 23.1
2016-10-01 22.3
2017-01-01 23.7
2017-04-01 22.1
2017-07-01 21.6
2017-10-01 21.1
2018-01-01 22.1
2018-04-01 21.9
