Quarter	Percent
2005-01-01	80.2584262938778
2005-04-01	79.8276433289451
2005-07-01	80.7249984918563
2005-10-01	80.4195389572508
2006-01-01	80.3881384978405
2006-04-01	80.6923956945270
2006-07-01	80.9635882557304
2006-10-01	80.8481648414512
2007-01-01	79.9695636329013
2007-04-01	80.1913223874641
2007-07-01	80.2691409498352
2007-10-01	80.8570629276580
2008-01-01	79.9352013561629
2008-04-01	80.2715721259397
2008-07-01	80.4219303132622
2008-10-01	79.2239033286837
2009-01-01	78.7387968769804
2009-04-01	78.6953360058048
2009-07-01	79.2695611379931
2009-10-01	79.3768298446740
2010-01-01	78.3705706346484
2010-04-01	79.3300023805832
2010-07-01	79.1078782795371
2010-10-01	78.0700641353206
2011-01-01	77.7304787613144
2011-04-01	78.3406125854867
2011-07-01	78.9556791278362
2011-10-01	78.8781056208509
2012-01-01	78.2682847419731
2012-04-01	79.1709842388464
2012-07-01	79.5010854755784
2012-10-01	78.2709121558807
2013-01-01	77.6835774311422
2013-04-01	78.6305987647379
2013-07-01	78.7407971156161
2013-10-01	78.9041798417125
2014-01-01	78.1639186795982
2014-04-01	78.1732599789367
2014-07-01	78.6482592116113
2014-10-01	78.0452512579034
2015-01-01	77.6377795651091
2015-04-01	77.9400557029411
2015-07-01	78.1789031026609
2015-10-01	78.1857500074406
2016-01-01	77.1472319255350
2016-04-01	77.5891399325025
2016-07-01	78.2179813249151
2016-10-01	77.9225896649124
2017-01-01	77.4447933609516
2017-04-01	77.6272430868931
2017-07-01	77.8072743932874
2017-10-01	77.4442080551078
2018-01-01	77.0904364390704
2018-04-01	77.5112936034736