Quarterly Percent
1999-04-01 55.9
2000-04-01 57.1
2001-04-01 57.2
2002-04-01 56.8
2003-04-01 54.9
2004-04-01 52.5
2005-01-01 49.1
2005-04-01 48.2
2005-07-01 47.7
2005-10-01 46.6
2006-01-01 46.3
2006-04-01 45.5
2006-07-01 44.9
2006-10-01 43.6
2007-01-01 44.2
2007-04-01 42.4
2007-07-01 42.7
2007-10-01 41.9
2008-01-01 42.4
2008-04-01 40.9
2008-07-01 41.2
2008-10-01 40.6
2009-01-01 40
2009-04-01 38.6
2009-07-01 39.5
2009-10-01 38.1
2010-01-01 37.2
2010-04-01 37.6
2010-07-01 37.7
2010-10-01 37.2
2011-01-01 36.5
2011-04-01 35.8
2011-07-01 35.8
2011-10-01 35.4
2012-01-01 35.3
2012-04-01 35
2012-07-01 34.1
2012-10-01 33.9
2013-01-01 33.5
2013-04-01 33
2013-07-01 32.2
2013-10-01 31.5
2014-01-01 31.3
2014-04-01 31.2
2014-07-01 30.7
2014-10-01 30.5
2015-01-01 31.0
2015-04-01 31.1
2015-07-01 30.3
2015-10-01 29.9
2016-01-01 29.3
2016-04-01 28.8
2016-07-01 28.4
2016-10-01 28.1
2017-01-01 28.5
2017-04-01 27.4
2017-07-01 27.1
2017-10-01 26.6
2018-01-01 27.2
2018-04-01 26.9
