Quarterly Percent
1998-01-01 70.1
1999-01-01 69.3
1999-04-01 70.2
1999-07-01 71.2
1999-10-01 73
2000-01-01 68.6
2000-04-01 69.3
2000-07-01 70.6
2000-10-01 69.6
2001-01-01 71
2001-04-01 69.1
2001-07-01 70.2
2001-10-01 69.1
2002-01-01 70.3
2002-04-01 69.2
2002-07-01 69
2002-10-01 68.5
2003-01-01 69
2003-04-01 67.3
2003-07-01 68
2003-10-01 67.7
2004-01-01 72.8
2004-04-01 71.4
2004-07-01 71.7
2004-10-01 70.8
2005-01-01 70.3
2005-04-01 69
2005-07-01 68.3
2005-10-01 67.8
2006-01-01 66.5
2006-04-01 65.6
2006-07-01 65.6
2006-10-01 64.9
2007-01-01 64.2
2007-04-01 62.3
2007-07-01 62.2
2007-10-01 62.3
2008-01-01 60.3
2008-04-01 60.1
2008-07-01 60.3
2008-10-01 60.4
2009-01-01 60.7
2009-04-01 59.6
2009-07-01 59
2009-10-01 58.6
2010-01-01 58.1
2010-04-01 57.6
2010-07-01 56.9
2010-10-01 58.5
2011-01-01 58.8
2011-04-01 58.2
2011-07-01 58.3
2011-10-01 58.9
2012-01-01 58.9
2012-04-01 56.7
2012-07-01 56.1
2012-10-01 55.9
2013-01-01 56.1
2013-04-01 54
2013-07-01 54.1
2013-10-01 53.8
2014-01-01 54.7
2014-04-01 52.6
2014-07-01 52.8
2014-10-01 52.3
2015-01-01 52.6
2015-04-01 51.8
2015-07-01 51.1
2015-10-01 50.3
2016-01-01 49.6
2016-04-01 47.8
2016-07-01 47.9
2016-10-01 47.8
2017-01-01 47.7
2017-04-01 46.8
2017-07-01 46.1
2017-10-01 45.2
2018-01-01 44.6
2018-04-01 44.4