Quarterly Percent
1998-01-01 48.5
1998-04-01 47.1
1998-07-01 47.1
1998-10-01 48.2
1999-01-01 46.9
1999-04-01 46.3
1999-07-01 47.0
1999-10-01 47.7
2000-01-01 46.8
2000-04-01 44.8
2000-07-01 46.7
2000-10-01 47
2001-01-01 46.8
2001-04-01 46.5
2001-07-01 48.2
2001-10-01 47.8
2002-01-01 47.3
2002-04-01 47.1
2002-07-01 47.9
2002-10-01 48.5
2003-01-01 46.7
2003-04-01 44.9
2003-07-01 45
2003-10-01 44.2
2004-01-01 43.3
2004-04-01 42.6
2004-07-01 44
2004-10-01 42.8
2005-01-01 42.1
2005-04-01 41.8
2005-07-01 42.7
2005-10-01 41.8
2006-01-01 41.4
2006-04-01 41.4
2006-07-01 42.3
2006-10-01 41.5
2007-01-01 41.5
2007-04-01 40.4
2007-07-01 41.9
2007-10-01 41.5
2008-01-01 41.1
2008-04-01 40.5
2008-07-01 41.2
2008-10-01 40.7
2009-01-01 39.8
2009-04-01 38.5
2009-07-01 38.6
2009-10-01 38
2010-01-01 37.1
2010-04-01 35.9
2010-07-01 35.9
2010-10-01 35.6
2011-01-01 38
2011-04-01 36.6
2011-07-01 39.8
2011-10-01 38.3
2012-01-01 36.7
2012-04-01 36.4
2012-07-01 39.1
2012-10-01 36.1
2013-01-01 34.8
2013-04-01 33.9
2013-07-01 36.7
2013-10-01 34.7
2014-01-01 34.2
2014-04-01 32.9
2014-07-01 36.4
2014-10-01 33.6
2015-01-01 33.4
2015-04-01 31.8
2015-07-01 34.9
2015-10-01 33.9
2016-01-01 33.2
2016-04-01 32.3
2016-07-01 33.7
2016-10-01 33.5
2017-01-01 33.4
2017-04-01 32.6
2017-07-01 35.2
2017-10-01 34.8
2018-01-01 33.3
2018-04-01 32.7
