Quarter	Net Percent, Seasonally Adjusted
1998-01-01	-60
1998-04-01	-59
1998-07-01	-66
1998-10-01	-68
1999-01-01	-65
1999-04-01	-49
1999-07-01	-47
1999-10-01	-50
2000-01-01	-45
2000-04-01	-48
2000-07-01	-50
2000-10-01	-43
2001-01-01	-44
2001-04-01	-45
2001-07-01	-44
2001-10-01	-39
2002-01-01	-42
2002-04-01	-48
2002-07-01	-50
2002-10-01	-49
2003-01-01	-45
2003-04-01	-45
2003-07-01	-45
2003-10-01	-45
2004-01-01	-43
2004-04-01	-38
2004-07-01	-45
2004-10-01	-43
2005-01-01	-21
2005-04-01	-32
2005-07-01	-27
2005-10-01	-28
2006-01-01	-24
2006-04-01	-11
2006-07-01	-42
2006-10-01	-20
2007-01-01	-16
2007-04-01	-16
2007-07-01	-15
2007-10-01	-13
2008-01-01	-11
2008-04-01	-10
2008-07-01	-12
2008-10-01	-13
2009-01-01	-31
2009-04-01	-35
2009-07-01	-34
2009-10-01	-34
2010-01-01	-32
2010-04-01	-34
2010-07-01	-29
2010-10-01	-29
2011-01-01	-23
2011-04-01	-24
2011-07-01	-22
2011-10-01	-23
2012-01-01	-22
2012-04-01	-24
2012-07-01	-23
2012-10-01	-24
2013-01-01	-19
2013-04-01	-23
2013-07-01	-21
2013-10-01	-21
2014-01-01	-19
2014-04-01	-23
2014-07-01	-25
2014-10-01	-24
2015-01-01	-17
2015-04-01	-21
2015-07-01	-21
2015-10-01	-20
2016-01-01	-33
2016-04-01	-37
2016-07-01	-36
2016-10-01	-38
2017-01-01	-36
2017-04-01	-39
2017-07-01	-36
2017-10-01	-36
2018-01-01	-42
2018-04-01	-43
2018-07-01	-40