Quarterly Percent
1999-04-01 45.7
1999-07-01 35.4
1999-10-01 43.6
2000-01-01 45
2000-04-01 44
2000-07-01 34.8
2000-10-01 43.6
2001-01-01 44.6
2001-04-01 45.3
2001-07-01 35.8
2001-10-01 45
2002-01-01 46.2
2002-04-01 47.2
2002-07-01 38.6
2002-10-01 45.1
2003-01-01 46
2003-04-01 46.8
2003-07-01 38.3
2003-10-01 44.8
2004-01-01 46.2
2004-04-01 47.1
2004-07-01 38
2004-10-01 45.1
2005-01-01 46.2
2005-04-01 46.6
2005-07-01 37.3
2005-10-01 43.5
2006-01-01 43.9
2006-04-01 42.8
2006-07-01 34.5
2006-10-01 41.7
2007-01-01 26.5
2007-04-01 25.6
2007-07-01 22.1
2007-10-01 27.9
2008-01-01 30.6
2008-04-01 28.9
2008-07-01 25.6
2008-10-01 34.8
2009-01-01 38.3
2009-04-01 34.9
2009-07-01 35.6
2009-10-01 40.2
2010-01-01 44.9
2010-04-01 42.4
2010-07-01 41.8
2010-10-01 46.9
2011-01-01 49.0
2011-04-01 46.5
2011-07-01 44.0
2011-10-01 46.2
2012-01-01 51.6
2012-04-01 46.9
2012-07-01 44.2
2012-10-01 49.7
2013-01-01 52.2
2013-04-01 47.4
2013-07-01 44.4
2013-10-01 49.5
2014-01-01 52.4
2014-04-01 49.9
2014-07-01 46.6
2014-10-01 50.4
2015-01-01 51.5
2015-04-01 49.7
2015-07-01 46.4
2015-10-01 51.8
2016-01-01 52.6
2016-04-01 45.5
2016-07-01 41.5
2016-10-01 49.7
2017-01-01 54.3
2017-04-01 50.3
2017-07-01 51.3
2017-10-01 52.6
2018-01-01 55.2
2018-04-01 51.2