Quarterly Percent
1998-01-01 81.9
1999-01-01 81.7
1999-04-01 82.7
1999-07-01 83.2
1999-10-01 85
2000-01-01 81.1
2000-04-01 82.2
2000-07-01 83.3
2000-10-01 81.3
2001-01-01 81.7
2001-04-01 80.7
2001-07-01 82.1
2001-10-01 80.4
2002-01-01 80.7
2002-04-01 80.3
2002-07-01 79.4
2002-10-01 79.1
2003-01-01 79.8
2003-04-01 77.3
2003-07-01 78.2
2003-10-01 77.8
2004-01-01 81.9
2004-04-01 81.5
2004-07-01 81.6
2004-10-01 79.8
2005-01-01 79.3
2005-04-01 77.6
2005-07-01 76.4
2005-10-01 76.9
2006-01-01 75.7
2006-04-01 75.1
2006-07-01 74.9
2006-10-01 73.7
2007-01-01 73.1
2007-04-01 73
2007-07-01 72.5
2007-10-01 71.6
2008-01-01 70.4
2008-04-01 70.5
2008-07-01 69.1
2008-10-01 69.7
2009-01-01 69.6
2009-04-01 69.4
2009-07-01 69
2009-10-01 67.7
2010-01-01 66.3
2010-04-01 66.2
2010-07-01 65.6
2010-10-01 67.5
2011-01-01 66.9
2011-04-01 66.7
2011-07-01 66.8
2011-10-01 67.6
2012-01-01 66.7
2012-04-01 65.2
2012-07-01 65.3
2012-10-01 64.8
2013-01-01 64.8
2013-04-01 63
2013-07-01 63.3
2013-10-01 63.4
2014-01-01 64.1
2014-04-01 62.2
2014-07-01 62
2014-10-01 61.8
2015-01-01 61.2
2015-04-01 59.6
2015-07-01 59.5
2015-10-01 59.0
2016-01-01 58.7
2016-04-01 56.7
2016-07-01 56.9
2016-10-01 56.8
2017-01-01 56.7
2017-04-01 56.2
2017-07-01 54.9
2017-10-01 54.5
2018-01-01 53.7
2018-04-01 54.3
