Quarterly Percent
1999-04-01 80.9
2000-04-01 82.2
2001-04-01 81.9
2002-04-01 80.3
2003-01-01 76.7
2003-04-01 79.8
2003-07-01 80.9
2003-10-01 77.1
2004-01-01 76.3
2004-04-01 78.6
2004-07-01 79
2004-10-01 77.3
2005-01-01 77
2005-04-01 80.5
2005-07-01 80.8
2005-10-01 78.8
2006-01-01 78.8
2006-04-01 81
2006-07-01 81.2
2006-10-01 79.5
2007-01-01 80.1
2007-04-01 81.6
2007-07-01 81.5
2007-10-01 79.9
2008-01-01 78.7
2008-04-01 81
2008-07-01 80.5
2008-10-01 77.8
2009-01-01 73.4
2009-04-01 73.9
2009-07-01 76.3
2009-10-01 74.6
2010-01-01 73.3
2010-04-01 75.1
2010-07-01 75.1
2010-10-01 73.7
2011-01-01 72.5
2011-04-01 75.4
2011-07-01 75.4
2011-10-01 73.5
2012-01-01 73
2012-04-01 76.1
2012-07-01 76.4
2012-10-01 74.8
2013-01-01 73.8
2013-04-01 76.9
2013-07-01 78.4
2013-10-01 76.3
2014-01-01 75.4
2014-04-01 78.9
2014-07-01 79.8
2014-10-01 78.4
2015-01-01 78.1
2015-04-01 80.6
2015-07-01 80.8
2015-10-01 79.3
2016-01-01 79.5
2016-04-01 82.1
2016-07-01 82.6
2016-10-01 81.0
2017-01-01 80.8
2017-04-01 81.8
2017-07-01 80.4
2017-10-01 79.4
2018-01-01 78.7
2018-04-01 80.2