Quarterly Percent
2006-01-01 78.7
2006-04-01 76.7
2006-07-01 75.1
2006-10-01 75.9
2007-01-01 77.7
2007-04-01 75.9
2007-07-01 75
2007-10-01 77.5
2008-01-01 77.9
2008-04-01 75.8
2008-07-01 73.6
2008-10-01 75.2
2009-01-01 77.4
2009-04-01 75.5
2009-07-01 72.5
2009-10-01 75
2010-01-01 76
2010-04-01 74.9
2010-07-01 72.4
2010-10-01 74.6
2011-01-01 75.8
2011-04-01 73.7
2011-07-01 71.7
2011-10-01 74.1
2012-01-01 76.4
2012-04-01 74.5
2012-07-01 74.2
2012-10-01 74
2013-01-01 74.5
2013-04-01 72.8
2013-07-01 71.5
2013-10-01 74
2014-01-01 74.5
2014-04-01 72.1
2014-07-01 70.8
2014-10-01 72
2015-01-01 72.9
2015-04-01 70.2
2015-07-01 68.0
2015-10-01 70.7
2016-01-01 71.8
2016-04-01 69.8
2016-07-01 67.3
2016-10-01 69.7
2017-01-01 71.3
2017-04-01 69.0
2017-07-01 66.8
2017-10-01 69.0
2018-01-01 70.7
2018-04-01 69.1
