Quarterly Percent
1999-01-01 89.7
1999-04-01 88.7
1999-07-01 88.1
1999-10-01 87.9
2000-01-01 87.9
2000-04-01 86.8
2000-07-01 86
2000-10-01 85.3
2001-01-01 85.7
2001-04-01 85.6
2001-07-01 84.3
2001-10-01 84.1
2002-01-01 83.4
2002-04-01 82.7
2002-07-01 81.9
2002-10-01 80.2
2003-01-01 79.2
2003-04-01 78.2
2003-07-01 77.2
2003-10-01 76
2004-01-01 75.2
2004-04-01 74.9
2004-07-01 73.9
2004-10-01 72.9
2005-01-01 73.2
2005-04-01 72.3
2005-07-01 72
2005-10-01 71.8
2006-01-01 72.3
2006-04-01 72.1
2006-07-01 72.4
2006-10-01 72.5
2007-01-01 73
2007-04-01 72.3
2007-07-01 73.5
2007-10-01 73.7
2008-01-01 73.8
2008-04-01 74
2008-07-01 73
2008-10-01 72.7
2009-01-01 72.7
2009-04-01 72.3
2009-07-01 72.2
2009-10-01 70.5
2010-01-01 70.1
2010-04-01 69
2010-07-01 67.6
2010-10-01 66.6
2011-01-01 65.9
2011-04-01 65.2
2011-07-01 64.9
2011-10-01 65
2012-01-01 65.6
2012-04-01 65
2012-07-01 65.1
2012-10-01 66.3
2013-01-01 66.6
2013-04-01 65.5
2013-07-01 64.9
2013-10-01 64.1
2014-01-01 63.9
2014-04-01 62.7
2014-07-01 62
2014-10-01 61.9
2015-01-01 61.4
2015-04-01 60.3
2015-07-01 59.3
2015-10-01 59.4
2016-01-01 58.0
2016-04-01 56.5
2016-07-01 55.9
2016-10-01 55.7
2017-01-01 56.8
2017-04-01 55.9
2017-07-01 55.1
2017-10-01 55.0
2018-01-01 54.0
2018-04-01 54.3