Quarterly Percent
1999-04-01 80.3
2000-01-01 80.8
2000-04-01 82.1
2000-07-01 82.6
2000-10-01 82.9
2001-01-01 82.4
2001-04-01 82.7
2001-07-01 83
2001-10-01 82.9
2002-01-01 82.2
2002-04-01 82.9
2002-07-01 82.5
2002-10-01 82.2
2003-01-01 81
2003-04-01 81.4
2003-07-01 81.2
2003-10-01 80.7
2004-01-01 80.1
2004-04-01 80.2
2004-07-01 80.7
2004-10-01 80
2005-01-01 79.3
2005-04-01 79.9
2005-07-01 80.4
2005-10-01 80.1
2006-01-01 79.9
2006-04-01 80.8
2006-07-01 81.3
2006-10-01 81.7
2007-01-01 81.5
2007-04-01 82.3
2007-07-01 82.8
2007-10-01 82.4
2008-01-01 82.5
2008-04-01 83.3
2008-07-01 83.5
2008-10-01 83.4
2009-01-01 82.7
2009-04-01 82.7
2009-07-01 82.4
2009-10-01 81.7
2010-01-01 79.5
2010-04-01 80
2010-07-01 80.3
2010-10-01 80.1
2011-01-01 78.9
2011-04-01 79.1
2011-07-01 79.7
2011-10-01 79.8
2012-01-01 79.3
2012-04-01 79.5
2012-07-01 79.5
2012-10-01 78.9
2013-01-01 78.0
2013-04-01 78.3
2013-07-01 78.3
2013-10-01 78.1
2014-01-01 77.4
2014-04-01 78.0
2014-07-01 78.6
2014-10-01 78.6
2015-01-01 78.5
2015-04-01 78.9
2015-07-01 79.4
2015-10-01 79.2
2016-01-01 79.0
2016-04-01 79.5
2016-07-01 79.9
2016-10-01 80.0
2017-01-01 79.7
2017-04-01 80.2
2017-07-01 80.8
2017-10-01 80.9
2018-01-01 80.8
2018-04-01 81.3