Quarterly Percent
2006-01-01 77.4
2006-04-01 74
2006-07-01 73.5
2006-10-01 74.9
2007-01-01 76.1
2007-04-01 73.5
2007-07-01 73.7
2007-10-01 76
2008-01-01 76.3
2008-04-01 72.9
2008-07-01 72.4
2008-10-01 73.8
2009-01-01 74.8
2009-04-01 71.5
2009-07-01 70.6
2009-10-01 71.8
2010-01-01 72.1
2010-04-01 69.5
2010-07-01 69.4
2010-10-01 70.5
2011-01-01 70.8
2011-04-01 67.9
2011-07-01 67.7
2011-10-01 69.4
2012-01-01 70.4
2012-04-01 67.4
2012-07-01 67.6
2012-10-01 67.5
2013-01-01 68.1
2013-04-01 65.5
2013-07-01 66.2
2013-10-01 67.2
2014-01-01 68.2
2014-04-01 65.7
2014-07-01 65.8
2014-10-01 66.1
2015-01-01 66.7
2015-04-01 64.4
2015-07-01 64.4
2015-10-01 64.9
2016-01-01 65.3
2016-04-01 63.4
2016-07-01 63.1
2016-10-01 63.5
2017-01-01 63.9
2017-04-01 62.1
2017-07-01 61.8
2017-10-01 62.1
2018-01-01 62.7
2018-04-01 61.5
