Quarterly Percent
2006-01-01 44.9
2006-04-01 41.6
2006-07-01 41.4
2006-10-01 42.4
2007-01-01 44
2007-04-01 41.3
2007-07-01 41.4
2007-10-01 43.2
2008-01-01 44
2008-04-01 40.8
2008-07-01 40.6
2008-10-01 41.6
2009-01-01 42.7
2009-04-01 39.9
2009-07-01 39.5
2009-10-01 40.2
2010-01-01 40.3
2010-04-01 37.9
2010-07-01 38.5
2010-10-01 39
2011-01-01 39
2011-04-01 36.7
2011-07-01 37.1
2011-10-01 38
2012-01-01 39.1
2012-04-01 36.5
2012-07-01 36.8
2012-10-01 36.3
2013-01-01 37.1
2013-04-01 34.9
2013-07-01 36.1
2013-10-01 36
2014-01-01 36.6
2014-04-01 35
2014-07-01 35.4
2014-10-01 35.3
2015-01-01 35.4
2015-04-01 34.0
2015-07-01 34.5
2015-10-01 34.3
2016-01-01 34.6
2016-04-01 33.1
2016-07-01 33.3
2016-10-01 33.1
2017-01-01 33.2
2017-04-01 32.1
2017-07-01 32.3
2017-10-01 32.3
2018-01-01 32.7
2018-04-01 31.9
