Quarterly Percent
1998-01-01 52.3
1998-04-01 50.8
1998-07-01 50.5
1998-10-01 51.6
1999-01-01 50.3
1999-04-01 50.5
1999-07-01 51.0
1999-10-01 53
2000-01-01 52
2000-04-01 49.6
2000-07-01 52.1
2000-10-01 52.3
2001-01-01 51.8
2001-04-01 51.5
2001-07-01 53.6
2001-10-01 52.9
2002-01-01 52.7
2002-04-01 52.4
2002-07-01 53.7
2002-10-01 52.8
2003-01-01 50.4
2003-04-01 48.3
2003-07-01 49.1
2003-10-01 48
2004-01-01 47.2
2004-04-01 47.1
2004-07-01 48.2
2004-10-01 46.7
2005-01-01 45.9
2005-04-01 46.3
2005-07-01 46.2
2005-10-01 45.7
2006-01-01 45.4
2006-04-01 45.9
2006-07-01 45.8
2006-10-01 45
2007-01-01 45
2007-04-01 43.7
2007-07-01 45.6
2007-10-01 44.4
2008-01-01 44.7
2008-04-01 43.7
2008-07-01 43
2008-10-01 43
2009-01-01 41
2009-04-01 40.1
2009-07-01 39.8
2009-10-01 39.5
2010-01-01 38.5
2010-04-01 37.5
2010-07-01 38.1
2010-10-01 37.8
2011-01-01 39.9
2011-04-01 38.7
2011-07-01 42.2
2011-10-01 40.8
2012-01-01 38.9
2012-04-01 38.5
2012-07-01 41.5
2012-10-01 38
2013-01-01 36.5
2013-04-01 35.2
2013-07-01 38
2013-10-01 35.2
2014-01-01 34.8
2014-04-01 33.3
2014-07-01 36.9
2014-10-01 34
2015-01-01 33.5
2015-04-01 32.5
2015-07-01 35.2
2015-10-01 35.7
2016-01-01 33.9
2016-04-01 34.3
2016-07-01 36.1
2016-10-01 35.8
2017-01-01 35.2
2017-04-01 34.2
2017-07-01 36.5
2017-10-01 36.3
2018-01-01 35.7
2018-04-01 34.9