Quarter	Percent
2005-01-01	62.5769758917970
2005-04-01	61.4953421051559
2005-07-01	63.5586304306934
2005-10-01	62.1671969925745
2006-01-01	62.2464422595552
2006-04-01	62.6265341329033
2006-07-01	63.9538029339201
2006-10-01	63.1109548118361
2007-01-01	61.9828847963712
2007-04-01	61.7698012305367
2007-07-01	62.7347891448725
2007-10-01	64.0334539636816
2008-01-01	61.7989118941846
2008-04-01	61.9848246227036
2008-07-01	63.7596803610538
2008-10-01	61.3227683092306
2009-01-01	59.4993965623158
2009-04-01	59.8725966976999
2009-07-01	61.4215462355544
2009-10-01	62.3971154595406
2010-01-01	59.9204817023921
2010-04-01	61.6842247270137
2010-07-01	62.6380866023067
2010-10-01	60.6112253456931
2011-01-01	59.2171769612955
2011-04-01	60.3604985999231
2011-07-01	61.4095262022231
2011-10-01	61.9164068807751
2012-01-01	59.4703685960078
2012-04-01	61.1909592876383
2012-07-01	62.4633948651273
2012-10-01	60.1784798697698
2013-01-01	58.5733244184822
2013-04-01	59.8622821177278
2013-07-01	60.9467470006821
2013-10-01	59.8253975266045
2014-01-01	58.5670720183453
2014-04-01	58.7655014107719
2014-07-01	60.1252430584687
2014-10-01	58.0575159788417
2015-01-01	56.8704203032282
2015-04-01	57.5271642065458
2015-07-01	58.5274922611888
2015-10-01	58.8205352805183
2016-01-01	56.1281111964103
2016-04-01	56.6879771075098
2016-07-01	58.9897354026127
2016-10-01	57.1047614865130
2017-01-01	55.8529985854992
2017-04-01	56.6456069926568
2017-07-01	57.3831727800796
2017-10-01	57.0480172154695
2018-01-01	55.1371521220855
2018-04-01	56.3618030382142