Quarterly Percent
1998-01-01 79.3
1998-04-01 80.4
1998-07-01 80.1
1998-10-01 80.5
1999-01-01 80.4
1999-04-01 80.7
1999-07-01 80.8
1999-10-01 80.8
2000-01-01 81.3
2000-04-01 81.7
2000-07-01 82.0
2000-10-01 82.2
2001-01-01 82.5
2001-04-01 82.2
2001-07-01 82.2
2001-10-01 82.3
2002-01-01 81.8
2002-04-01 82
2002-07-01 81.8
2002-10-01 80.5
2003-01-01 80.6
2003-04-01 81
2003-07-01 81.1
2003-10-01 81
2004-01-01 81.1
2004-04-01 81.3
2004-07-01 81
2004-10-01 81
2005-01-01 80.6
2005-04-01 80.8
2005-07-01 80.7
2005-10-01 80.7
2006-01-01 81.1
2006-04-01 81.5
2006-07-01 81.4
2006-10-01 81
2007-01-01 80.6
2007-04-01 80.9
2007-07-01 81
2007-10-01 81.2
2008-01-01 81.6
2008-04-01 82
2008-07-01 81.4
2008-10-01 81.4
2009-01-01 80.4
2009-04-01 80.2
2009-07-01 78.9
2009-10-01 79.2
2010-01-01 79.5
2010-04-01 79.2
2010-07-01 79.3
2010-10-01 78.8
2011-01-01 78
2011-04-01 78.8
2011-07-01 77.8
2011-10-01 76.6
2012-01-01 76
2012-04-01 76.3
2012-07-01 75.4
2012-10-01 74.2
2013-01-01 73.4
2013-04-01 74.2
2013-07-01 75
2013-10-01 75.7
2014-01-01 75.9
2014-04-01 77.6
2014-07-01 77.8
2014-10-01 78.1
2015-01-01 77.6
2015-04-01 79.3
2015-07-01 79.1
2015-10-01 79.3
2016-01-01 79.0
2016-04-01 80.1
2016-07-01 80.8
2016-10-01 80.9
2017-01-01 81.1
2017-04-01 82.3
2017-07-01 83.2
2017-10-01 83.6
2018-01-01 83.6
2018-04-01 84.7