Quarterly Percent
1998-01-01 88
1998-04-01 89.1
1998-07-01 89.4
1998-10-01 88.7
1999-01-01 88.3
1999-04-01 88.8
1999-07-01 88.5
1999-10-01 87.3
2000-01-01 87.8
2000-04-01 88.7
2000-07-01 89
2000-10-01 88.6
2001-01-01 88.1
2001-04-01 88.9
2001-07-01 89
2001-10-01 88
2002-01-01 87.6
2002-04-01 89.1
2002-07-01 89.2
2002-10-01 88.8
2003-01-01 88.7
2003-04-01 89.3
2003-07-01 89.8
2003-10-01 89.1
2004-01-01 88.6
2004-04-01 89.6
2004-07-01 89.6
2004-10-01 89.2
2005-01-01 89.1
2005-04-01 89.8
2005-07-01 89.6
2005-10-01 89.4
2006-01-01 89.2
2006-04-01 89.9
2006-07-01 90.5
2006-10-01 90.3
2007-01-01 89.7
2007-04-01 90.1
2007-07-01 90.4
2007-10-01 90.1
2008-01-01 89.9
2008-04-01 90.7
2008-07-01 90.4
2008-10-01 89.5
2009-01-01 88.2
2009-04-01 88.8
2009-07-01 88.8
2009-10-01 87.4
2010-01-01 86.4
2010-04-01 85.9
2010-07-01 85.3
2010-10-01 83.5
2011-01-01 81.4
2011-04-01 81.2
2011-07-01 80.1
2011-10-01 76.9
2012-01-01 75.3
2012-04-01 74.4
2012-07-01 73.7
2012-10-01 72.3
2013-01-01 71
2013-04-01 71.7
2013-07-01 71.8
2013-10-01 71
2014-01-01 70.7
2014-04-01 71.9
2014-07-01 72.7
2014-10-01 71.7
2015-01-01 71.5
2015-04-01 73.8
2015-07-01 75.0
2015-10-01 74.3
2016-01-01 74.6
2016-04-01 76.9
2016-07-01 77.0
2016-10-01 75.5
2017-01-01 75.6
2017-04-01 77.9
2017-07-01 79.0
2017-10-01 77.5
2018-01-01 77.6
2018-04-01 79.9