Quarter	Percent
2005-01-01	59.9169325799576
2005-04-01	59.4357147931935
2005-07-01	58.6110993174580
2005-10-01	58.4335907523587
2006-01-01	58.5272401942685
2006-04-01	58.3647728473873
2006-07-01	57.3480468838587
2006-10-01	57.3599096669833
2007-01-01	57.9822023453007
2007-04-01	57.7894108250032
2007-07-01	57.8441855354629
2007-10-01	56.6094279227155
2008-01-01	57.6005239720792
2008-04-01	57.2211333812288
2008-07-01	57.8880891228420
2008-10-01	58.1487592521656
2009-01-01	58.3505512480328
2009-04-01	58.0430961252276
2009-07-01	56.1072719790455
2009-10-01	56.4283492223440
2010-01-01	57.7609285900376
2010-04-01	56.8681941495014
2010-07-01	56.9456609546022
2010-10-01	58.3155339433805
2011-01-01	58.5680669414434
2011-04-01	57.3726888965450
2011-07-01	56.9465653006513
2011-10-01	55.7328193650004
2012-01-01	57.2012959773517
2012-04-01	55.6277341023398
2012-07-01	55.5206237247202
2012-10-01	56.2332164634843
2013-01-01	57.2504122327742
2013-04-01	55.7937136620357
2013-07-01	55.8839860875061
2013-10-01	55.5416990120847
2014-01-01	56.8587099135290
2014-04-01	56.7218937425176
2014-07-01	57.0184251372669
2014-10-01	57.1851550622509
2015-01-01	57.5118871480135
2015-04-01	56.8936216079451
2015-07-01	56.5162599350776
2015-10-01	55.6734131435428
2016-01-01	57.0752579221225
2016-04-01	56.5939288023273
2016-07-01	56.0713003925103
2016-10-01	56.6534651527822
2017-01-01	57.1564834665492
2017-04-01	57.0681291459755
2017-07-01	57.1378799587962
2017-10-01	56.7990070363759
2018-01-01	57.3786392288151
2018-04-01	56.2518957082006