Quarterly Percent
1999-04-01 35.6
2000-04-01 38.6
2001-04-01 35.5
2002-04-01 37.7
2003-01-01 40.1
2003-04-01 40.1
2003-07-01 40.1
2003-10-01 40.1
2004-01-01 38.8
2004-04-01 38.8
2004-07-01 38.8
2004-10-01 38.8
2005-01-01 39.4
2005-04-01 39.4
2005-07-01 39.4
2005-10-01 39.4
2006-01-01 38.9
2006-04-01 38.9
2006-07-01 38.9
2006-10-01 38.9
2007-01-01 33.7
2007-04-01 39.7
2007-07-01 38.6
2007-10-01 33.4
2008-01-01 32.9
2008-04-01 44.5
2008-07-01 43.3
2008-10-01 37.8
2009-01-01 48.7
2009-04-01 54.1
2009-07-01 45.5
2009-10-01 42.5
2010-01-01 47.9
2010-04-01 51.6
2010-07-01 47.8
2010-10-01 47.9
2011-01-01 49.1
2011-04-01 45.2
2011-07-01 51
2011-10-01 48.4
2012-01-01 50.5
2012-04-01 44.9
2012-07-01 47.6
2012-10-01 50.3
2013-01-01 52.8
2013-04-01 51.3
2013-07-01 49.2
2013-10-01 48.5
2014-01-01 47.9
2014-04-01 54.7
2014-07-01 51.4
2014-10-01 54.3
2015-01-01 49.4
2015-04-01 48.8
2015-07-01 40.8
2015-10-01 42.8
2016-01-01 49.5
2016-04-01 50.7
2016-07-01 47.2
2016-10-01 49.0
2017-01-01 50.3
2017-04-01 48.0
2017-07-01 44.7
2017-10-01 44.5
2018-01-01 46.3
2018-04-01 45.8