Quarterly Percent
1999-01-01 28.4
2000-01-01 29.4
2001-01-01 30.7
2002-01-01 33.8
2003-01-01 36.3
2003-04-01 37.3
2003-07-01 37.2
2003-10-01 37.2
2004-01-01 37.5
2004-04-01 37.7
2004-07-01 38.2
2004-10-01 37.9
2005-01-01 38.6
2005-04-01 39.2
2005-07-01 38.5
2005-10-01 37.9
2006-01-01 38.2
2006-04-01 38.4
2006-07-01 38.1
2006-10-01 37.8
2007-01-01 37.9
2007-04-01 39.0
2007-07-01 38.2
2007-10-01 37.8
2008-01-01 37.6
2008-04-01 38.4
2008-07-01 38.2
2008-10-01 38.5
2009-01-01 38.5
2009-04-01 39.4
2009-07-01 39.0
2009-10-01 38.8
2010-01-01 38.9
2010-04-01 39.9
2010-07-01 40.2
2010-10-01 39.9
2011-01-01 40.0
2011-04-01 41.4
2011-07-01 41.6
2011-10-01 42.5
2012-01-01 43.1
2012-04-01 44.1
2012-07-01 45
2012-10-01 45.7
2013-01-01 45.1
2013-04-01 45.7
2013-07-01 45.9
2013-10-01 45.7
2014-01-01 46
2014-04-01 46.9
2014-07-01 47.1
2014-10-01 47.7
2015-01-01 48.0
2015-04-01 49.1
2015-07-01 49.0
2015-10-01 48.8
2016-01-01 49.3
2016-04-01 49.8
2016-07-01 50.1
2016-10-01 50.0
2017-01-01 50.4
2017-04-01 51.7
2017-07-01 51.1
2017-10-01 51.9
2018-01-01 51.8
2018-04-01 52.1
