Quarterly Percent
1998-04-01 72.2
1999-04-01 74
2000-04-01 73.4
2001-01-01 74.8
2001-04-01 76
2001-07-01 76.8
2001-10-01 75.3
2002-01-01 75.2
2002-04-01 76.1
2002-07-01 76.8
2002-10-01 74.9
2003-01-01 74.9
2003-04-01 76
2003-07-01 76.2
2003-10-01 74.5
2004-01-01 74.3
2004-04-01 75.5
2004-07-01 76.5
2004-10-01 74.3
2005-01-01 73.6
2005-04-01 77.2
2005-07-01 76.9
2005-10-01 75.7
2006-01-01 75.3
2006-04-01 77.1
2006-07-01 77.5
2006-10-01 75.2
2007-01-01 75.3
2007-04-01 77.7
2007-07-01 77.9
2007-10-01 76.2
2008-01-01 76
2008-04-01 78
2008-07-01 77.9
2008-10-01 75.8
2009-01-01 75.9
2009-04-01 77.8
2009-07-01 76.8
2009-10-01 75.1
2010-01-01 75.2
2010-04-01 77.2
2010-07-01 77.2
2010-10-01 75.3
2011-01-01 76.3
2011-04-01 78.4
2011-07-01 78
2011-10-01 76.7
2012-01-01 76.8
2012-04-01 79
2012-07-01 78.8
2012-10-01 77.1
2013-01-01 77.5
2013-04-01 79.7
2013-07-01 79.6
2013-10-01 78.2
2014-01-01 78.2
2014-04-01 80.2
2014-07-01 80.6
2014-10-01 78.2
2015-01-01 78.9
2015-04-01 80.8
2015-07-01 80.7
2015-10-01 79.2
2016-01-01 79.4
2016-04-01 81.2
2016-07-01 80.7
2016-10-01 79.4
2017-01-01 80.0
2017-04-01 81.4
2017-07-01 81.5
2017-10-01 79.7
2018-01-01 79.9
2018-04-01 82.1