Quarter	Net Percent, Seasonally Adjusted
1998-01-01	-8
1998-04-01	-6
1998-07-01	-31
1998-10-01	-29
1999-01-01	-24
1999-04-01	-21
1999-07-01	-19
1999-10-01	-14
2000-01-01	-14
2000-04-01	-14
2000-07-01	-14
2000-10-01	-12
2001-01-01	-9
2001-04-01	-10
2001-07-01	-10
2001-10-01	-7
2002-01-01	-9
2002-04-01	-7
2002-07-01	-8
2002-10-01	-7
2003-01-01	-8
2003-04-01	-6
2003-07-01	-7
2003-10-01	-6
2004-01-01	-7
2004-04-01	-7
2004-07-01	-6
2004-10-01	-5
2005-01-01	-6
2005-04-01	-4
2005-07-01	-6
2005-10-01	-5
2006-01-01	-6
2006-04-01	-5
2006-07-01	-6
2006-10-01	-4
2007-01-01	-4
2007-04-01	-3
2007-07-01	-4
2007-10-01	-5
2008-01-01	-4
2008-04-01	-3
2008-07-01	-3
2008-10-01	-5
2009-01-01	-7
2009-04-01	-7
2009-07-01	-7
2009-10-01	-9
2010-01-01	-6
2010-04-01	-8
2010-07-01	-6
2010-10-01	-5
2011-01-01	-3
2011-04-01	-3
2011-07-01	-4
2011-10-01	-7
2012-01-01	-2
2012-04-01	-4
2012-07-01	-3
2012-10-01	-3
2013-01-01	-5
2013-04-01	3
2013-07-01	-2
2013-10-01	5
2014-01-01	4
2014-04-01	-5
2014-07-01	-2
2014-10-01	-4
2015-01-01	-5
2015-04-01	-5
2015-07-01	-4
2015-10-01	1
2016-01-01	-4
2016-04-01	-6
2016-07-01	-7
2016-10-01	-6
2017-01-01	-8
2017-04-01	-7
2017-07-01	-8
2017-10-01	-7
2018-01-01	-5
2018-04-01	-7
2018-07-01	-7