Quarter	Percent
2005-01-01	55.1857673288330
2005-04-01	56.0002724390402
2005-07-01	56.1607196663214
2005-10-01	56.2073297614476
2006-01-01	55.8884567768501
2006-04-01	56.7688707039158
2006-07-01	56.9330628007820
2006-10-01	57.0630543879853
2007-01-01	56.5844833299303
2007-04-01	57.3164068934914
2007-07-01	57.3476338114282
2007-10-01	57.5384669331711
2008-01-01	57.0527713218888
2008-04-01	57.7637336590858
2008-07-01	57.5277294591234
2008-10-01	57.4195357437186
2009-01-01	56.4254862477745
2009-04-01	56.8370223981956
2009-07-01	56.6919480726219
2009-10-01	56.6422609890558
2010-01-01	56.0847073124593
2010-04-01	56.7345463440786
2010-07-01	56.6398182340245
2010-10-01	56.5326800043423
2011-01-01	56.2160574199181
2011-04-01	56.9637703143002
2011-07-01	56.8027898711190
2011-10-01	56.9590015120543
2012-01-01	56.4226540911760
2012-04-01	57.2734215038884
2012-07-01	57.1807457036428
2012-10-01	57.2554390665630
2013-01-01	56.7553267055546
2013-04-01	57.5720919854984
2013-07-01	57.5679921238494
2013-10-01	57.7110660495077
2014-01-01	57.3682366866891
2014-04-01	58.0453372687224
2014-07-01	57.9605267259158
2014-10-01	58.2690266874741
2015-01-01	57.8829687228261
2015-04-01	58.6076303918495
2015-07-01	58.6298930660190
2015-10-01	59.0137678819140
2016-01-01	58.7463006387418
2016-04-01	59.3340523745351
2016-07-01	59.4864742436824
2016-10-01	59.6312398839543
2017-01-01	59.4367894669598
2017-04-01	60.1251447666036
2017-07-01	60.2643698469751
2017-10-01	60.5244432052002
2018-01-01	60.2834580038145
2018-04-01	60.9689713681487