Quarter	Percent
2005-01-01	26.9083997972816
2005-04-01	27.4833928073755
2005-07-01	27.8752254918786
2005-10-01	28.3591187418837
2006-01-01	28.1940733546006
2006-04-01	28.4278376636434
2006-07-01	28.8956823686634
2006-10-01	29.0386055864454
2007-01-01	28.5704355656401
2007-04-01	28.9010743734433
2007-07-01	28.7379347094757
2007-10-01	29.7992016081211
2008-01-01	29.1082716975342
2008-04-01	29.4694774356827
2008-07-01	28.9108549764320
2008-10-01	28.8902355466106
2009-01-01	28.6627078631032
2009-04-01	29.0195224636941
2009-07-01	29.7396721490891
2009-10-01	30.0573833531284
2010-01-01	29.1325984511201
2010-04-01	29.8240316544869
2010-07-01	29.5960521635550
2010-10-01	28.9451145063958
2011-01-01	28.7806947194116
2011-04-01	29.5299354973278
2011-07-01	29.6326481938553
2011-10-01	30.9473194661239
2012-01-01	30.0410957232713
2012-04-01	31.1235658705465
2012-07-01	31.0919436196056
2012-10-01	30.8079972539778
2013-01-01	30.0766310811560
2013-04-01	31.0690821175936
2013-07-01	30.8620053902146
2013-10-01	31.2762839269424
2014-01-01	30.2596417407339
2014-04-01	30.3581631672949
2014-07-01	30.1202540613737
2014-10-01	30.2561830692619
2015-01-01	30.2011130086802
2015-04-01	30.5563545135409
2015-07-01	30.8726614453775
2015-10-01	31.6459800346115
2016-01-01	30.7166246783022
2016-04-01	31.1866789709207
2016-07-01	31.4864472226725
2016-10-01	31.3455261012605
2017-01-01	31.0422532276844
2017-04-01	31.1239547832810
2017-07-01	31.0951051939822
2017-10-01	31.5085003840802
2018-01-01	31.2431643697871
2018-04-01	32.0830133868943