Quarterly Percent
1999-01-01 42.5
1999-04-01 42.1
1999-07-01 43.8
1999-10-01 42.6
2000-01-01 42.6
2000-04-01 41.8
2000-07-01 43.2
2000-10-01 42.6
2001-01-01 41.9
2001-04-01 41
2001-07-01 41.9
2001-10-01 40.4
2002-01-01 39.4
2002-04-01 39
2002-07-01 39.5
2002-10-01 38.9
2003-01-01 37.5
2003-04-01 36.9
2003-07-01 37.6
2003-10-01 36.8
2004-01-01 36.3
2004-04-01 35.5
2004-07-01 35.9
2004-10-01 35
2005-01-01 33.6
2005-04-01 31.7
2005-07-01 32.3
2005-10-01 32.1
2006-01-01 30.6
2006-04-01 29.9
2006-07-01 31.7
2006-10-01 31.2
2007-01-01 30.2
2007-04-01 29.8
2007-07-01 31.3
2007-10-01 29.6
2008-01-01 28.3
2008-04-01 26.6
2008-07-01 26.4
2008-10-01 25.7
2009-01-01 24.3
2009-04-01 24.1
2009-07-01 26.6
2009-10-01 26.6
2010-01-01 25.4
2010-04-01 24.7
2010-07-01 26.2
2010-10-01 25.8
2011-01-01 23.9
2011-04-01 21.9
2011-07-01 22.1
2011-10-01 22.9
2012-01-01 22.9
2012-04-01 22.7
2012-07-01 24.5
2012-10-01 24.3
2013-01-01 24.5
2013-04-01 23.3
2013-07-01 24
2013-10-01 23
2014-01-01 23.2
2014-04-01 22.2
2014-07-01 24.8
2014-10-01 24.1
2015-01-01 24.8
2015-04-01 24.1
2015-07-01 25.8
2015-10-01 24.8
2016-01-01 23.9
2016-04-01 22.7
2016-07-01 25.3
2016-10-01 26.9
2017-01-01 25.9
2017-04-01 26.2
2017-07-01 26.2
2017-10-01 27.6
2018-01-01 24.4
2018-04-01 24.3