Quarter	Percent
2005-01-01	49.5334603975664
2005-04-01	50.1574702071123
2005-07-01	50.3697549238457
2005-10-01	50.2819259482051
2006-01-01	49.8623160315925
2006-04-01	50.4404466135417
2006-07-01	50.7111423296136
2006-10-01	50.6060208103509
2007-01-01	50.0872754819968
2007-04-01	50.6057625225262
2007-07-01	50.7485125180230
2007-10-01	50.7696826433352
2008-01-01	50.3216152818794
2008-04-01	50.9720819878076
2008-07-01	51.0142573061624
2008-10-01	50.8749757050764
2009-01-01	50.5171647693582
2009-04-01	51.0425154550211
2009-07-01	51.2180080394522
2009-10-01	50.9457283348736
2010-01-01	50.6003873138962
2010-04-01	51.1118883909758
2010-07-01	51.1408907876052
2010-10-01	50.8275161179852
2011-01-01	50.5343005221803
2011-04-01	51.0926174072894
2011-07-01	51.1499929656075
2011-10-01	51.0907678027622
2012-01-01	50.7399989849638
2012-04-01	51.3897057347069
2012-07-01	51.4009656366244
2012-10-01	51.2759980999434
2013-01-01	50.9360485243972
2013-04-01	51.5046186040967
2013-07-01	51.4595182845688
2013-10-01	51.3725188966567
2014-01-01	51.0396573433502
2014-04-01	51.4135570141653
2014-07-01	51.3849205267782
2014-10-01	51.3800288527933
2015-01-01	51.0107672648150
2015-04-01	51.4851536395814
2015-07-01	51.4725767480136
2015-10-01	51.5783697354773
2016-01-01	51.3796981402657
2016-04-01	51.7581642161901
2016-07-01	51.9114796880617
2016-10-01	51.7741775308695
2017-01-01	51.5893215054469
2017-04-01	52.0126765476998
2017-07-01	52.1490176791161
2017-10-01	52.0665975877869
2018-01-01	51.8707588908203
2018-04-01	52.3439663255225