Quarter	Percent
2005-01-01	59.4096076626329
2005-04-01	60.0074569870326
2005-07-01	60.2921792705952
2005-10-01	60.0202003886366
2006-01-01	59.5935587572276
2006-04-01	60.1818506375105
2006-07-01	60.4734558039546
2006-10-01	60.2410214578857
2007-01-01	59.7000417997226
2007-04-01	60.2583190272040
2007-07-01	60.4488934069269
2007-10-01	60.2525089095278
2008-01-01	59.8053033345813
2008-04-01	60.4481785795908
2008-07-01	60.5855995415787
2008-10-01	60.2142211160200
2009-01-01	59.7571131996466
2009-04-01	60.2134925275176
2009-07-01	60.3388722736969
2009-10-01	59.9377155606406
2010-01-01	59.5989648466216
2010-04-01	60.1229308847152
2010-07-01	60.1742431959761
2010-10-01	59.7230634544402
2011-01-01	59.4253477784336
2011-04-01	59.9620048980617
2011-07-01	60.0670594261334
2011-10-01	59.8496930589063
2012-01-01	59.4292820326378
2012-04-01	60.0846680544909
2012-07-01	60.1647794478640
2012-10-01	59.8851644367108
2013-01-01	59.4783237883882
2013-04-01	60.0638647663122
2013-07-01	60.0842148423695
2013-10-01	59.7868587095982
2014-01-01	59.4497210674079
2014-04-01	59.8608448977852
2014-07-01	59.9744508476228
2014-10-01	59.7377146984833
2015-01-01	59.4162650260065
2015-04-01	59.8557591184243
2015-07-01	59.9402873032659
2015-10-01	59.8197239051766
2016-01-01	59.6096061503582
2016-04-01	60.0584060216144
2016-07-01	60.2481049767501
2016-10-01	59.9792429237066
2017-01-01	59.7401234310495
2017-04-01	60.1921427208292
2017-07-01	60.3888097303431
2017-10-01	60.1095433204386
2018-01-01	59.9232329772302
2018-04-01	60.4154326503237