Quarterly Percent
1998-01-01 53.7
1998-04-01 52.5
1998-07-01 53.7
1998-10-01 54.2
1999-01-01 52.1
1999-04-01 51
1999-07-01 51.1
1999-10-01 51.4
2000-01-01 49.6
2000-04-01 47.7
2000-07-01 48.5
2000-10-01 47.6
2001-01-01 45.6
2001-04-01 44.6
2001-07-01 45.7
2001-10-01 44.7
2002-01-01 42.4
2002-04-01 42.3
2002-07-01 42.4
2002-10-01 41.8
2003-01-01 40.1
2003-04-01 38.8
2003-07-01 39.4
2003-10-01 40.1
2004-01-01 38.5
2004-04-01 37.8
2004-07-01 39.1
2004-10-01 39.6
2005-01-01 39.5
2005-04-01 37.6
2005-07-01 38.7
2005-10-01 39.6
2006-01-01 37.8
2006-04-01 36.6
2006-07-01 37.8
2006-10-01 38.7
2007-01-01 37
2007-04-01 35.8
2007-07-01 36.8
2007-10-01 37.3
2008-01-01 35.2
2008-04-01 34.9
2008-07-01 36.4
2008-10-01 37.1
2009-01-01 35.9
2009-04-01 36.3
2009-07-01 38.4
2009-10-01 38.4
2010-01-01 35.8
2010-04-01 35
2010-07-01 37.4
2010-10-01 36.6
2011-01-01 34.2
2011-04-01 34.6
2011-07-01 37
2011-10-01 36.1
2012-01-01 35.7
2012-04-01 36
2012-07-01 37.4
2012-10-01 36.7
2013-01-01 36
2013-04-01 35.6
2013-07-01 38.1
2013-10-01 37.4
2014-01-01 37.2
2014-04-01 37.9
2014-07-01 38.9
2014-10-01 38.3
2015-01-01 37.5
2015-04-01 36.7
2015-07-01 37.1
2015-10-01 38.2
2016-01-01 37.2
2016-04-01 37.0
2016-07-01 38.2
2016-10-01 37.4
2017-01-01 36.6
2017-04-01 36.2
2017-07-01 37.5
2017-10-01 35.5
2018-01-01 34.4
2018-04-01 33.0
