Quarterly Percent
1998-01-01 61.4
1998-04-01 61.1
1998-07-01 61.9
1998-10-01 61.3
1999-01-01 60.8
1999-04-01 60.5
1999-07-01 60.7
1999-10-01 60.4
2000-01-01 60.9
2000-04-01 61.9
2000-07-01 61.8
2000-10-01 62.4
2001-01-01 61.7
2001-04-01 61.4
2001-07-01 60.9
2001-10-01 60.1
2002-01-01 58.6
2002-04-01 58.1
2002-07-01 57
2002-10-01 56.6
2003-01-01 56.2
2003-04-01 55.7
2003-07-01 55.2
2003-10-01 56
2004-01-01 55
2004-04-01 55.1
2004-07-01 54.8
2004-10-01 54.8
2005-01-01 53.7
2005-04-01 53.4
2005-07-01 52.3
2005-10-01 53.1
2006-01-01 51.8
2006-04-01 52.1
2006-07-01 52.2
2006-10-01 52.9
2007-01-01 52.3
2007-04-01 51.9
2007-07-01 51.4
2007-10-01 51.4
2008-01-01 50.9
2008-04-01 50.2
2008-07-01 50.7
2008-10-01 50.1
2009-01-01 49.8
2009-04-01 49.9
2009-07-01 50.4
2009-10-01 51.2
2010-01-01 50.5
2010-04-01 50.4
2010-07-01 50.4
2010-10-01 49.8
2011-01-01 49.3
2011-04-01 48.9
2011-07-01 49.4
2011-10-01 50
2012-01-01 49.5
2012-04-01 48
2012-07-01 46.8
2012-10-01 46.2
2013-01-01 46
2013-04-01 45.5
2013-07-01 44.9
2013-10-01 44.4
2014-01-01 44
2014-04-01 43.9
2014-07-01 42.5
2014-10-01 42.3
2015-01-01 42.6
2015-04-01 41.9
2015-07-01 41.8
2015-10-01 41.8
2016-01-01 40.6
2016-04-01 39.5
2016-07-01 38.9
2016-10-01 37.6
2017-01-01 37.2
2017-04-01 36.8
2017-07-01 36.1
2017-10-01 35.3
2018-01-01 34.2
2018-04-01 33.6