Quarter	Percent
2005-01-01	79.4699927565038
2005-04-01	80.0327608349379
2005-07-01	80.4810275560524
2005-10-01	79.9640117902539
2006-01-01	79.6215562844710
2006-04-01	80.2427439189824
2006-07-01	80.6214631838358
2006-10-01	80.1621647044275
2007-01-01	79.7366485071657
2007-04-01	80.2880331810510
2007-07-01	80.5767829103204
2007-10-01	80.1158094053788
2008-01-01	79.7278096620242
2008-04-01	80.3720052919004
2008-07-01	80.6512390155218
2008-10-01	80.0040407426288
2009-01-01	79.4525278672524
2009-04-01	79.8892336313404
2009-07-01	80.0010415869948
2009-10-01	79.3754840823685
2010-01-01	79.0994089996613
2010-04-01	79.6881092093492
2010-07-01	79.7855528249535
2010-10-01	79.1678039361530
2011-01-01	78.9058701919100
2011-04-01	79.4676423455118
2011-07-01	79.6633576898033
2011-10-01	79.3040322784698
2012-01-01	78.8321990448245
2012-04-01	79.5664077287369
2012-07-01	79.8480713263424
2012-10-01	79.4397029978248
2013-01-01	78.9771306970738
2013-04-01	79.6294759554393
2013-07-01	79.8440363345103
2013-10-01	79.3217318197782
2014-01-01	79.0820294852524
2014-04-01	79.5676319563994
2014-07-01	79.9663230686877
2014-10-01	79.4841684708917
2015-01-01	79.2445725274187
2015-04-01	79.6731295262924
2015-07-01	79.9511690847720
2015-10-01	79.6123385758242
2016-01-01	79.3951069402915
2016-04-01	79.9544199149790
2016-07-01	80.2701876384360
2016-10-01	79.8757972609684
2017-01-01	79.6157377043031
2017-04-01	80.1592371813902
2017-07-01	80.4886419966005
2017-10-01	80.0370288318835
2018-01-01	79.8926291366578
2018-04-01	80.4372967694670