Quarter	Percent
2005-01-01	78.9449207047996
2005-04-01	79.3982277822035
2005-07-01	80.7089469696199
2005-10-01	81.0175218992194
2006-01-01	81.7484092491050
2006-04-01	82.0605402562643
2006-07-01	81.7895729899752
2006-10-01	81.6937165264697
2007-01-01	80.1385005575551
2007-04-01	80.8818785469339
2007-07-01	79.4230187217313
2007-10-01	80.4607772695676
2008-01-01	80.2903331985040
2008-04-01	80.1706688477131
2008-07-01	78.7878308882488
2008-10-01	77.9143617702175
2009-01-01	78.5150715550326
2009-04-01	77.9601646745105
2009-07-01	78.9090121135062
2009-10-01	79.2368028080740
2010-01-01	78.0765860559682
2010-04-01	78.8534377384350
2010-07-01	78.0661143327461
2010-10-01	76.5322678296852
2011-01-01	76.9122025222442
2011-04-01	77.1184554145402
2011-07-01	77.8114118452452
2011-10-01	77.7001297556205
2012-01-01	77.9823568154019
2012-04-01	79.2649055940349
2012-07-01	79.5183234568010
2012-10-01	78.3134406817846
2013-01-01	77.4515042094063
2013-04-01	78.2040169268956
2013-07-01	77.9801478851270
2013-10-01	79.1223691781098
2014-01-01	78.2414478740500
2014-04-01	78.7141039184144
2014-07-01	79.5201097902759
2014-10-01	78.9296737988694
2015-01-01	78.8124933740523
2015-04-01	77.9737759000858
2015-07-01	78.5189464340266
2015-10-01	77.2846526783937
2016-01-01	76.8887814710066
2016-04-01	77.6692806115147
2016-07-01	77.6698476598483
2016-10-01	78.8554106163404
2017-01-01	78.2084076787960
2017-04-01	78.5440885492236
2017-07-01	78.6493800281846
2017-10-01	77.4755434816607
2018-01-01	77.9771939513843
2018-04-01	77.8244586039212