Quarter	Percent
1999-07-01	61.5330503710098
1999-10-01	61.5053608637473
2000-01-01	59.8980305953525
2000-04-01	61.6254613946184
2000-07-01	61.8372048603536
2000-10-01	61.4452773118912
2001-01-01	59.7494519959220
2001-04-01	62.2207087070899
2001-07-01	62.0496901390160
2001-10-01	61.9414912063002
2002-01-01	60.9090380186424
2002-04-01	62.8132615438567
2002-07-01	62.5263204280392
2002-10-01	62.1089727892100
2003-01-01	60.5335186429604
2003-04-01	62.0286053944333
2003-07-01	61.8887933683913
2003-10-01	61.9227446677112
2004-01-01	61.4701621824302
2004-04-01	62.8664164354085
2004-07-01	62.4690795286346
2004-10-01	62.5154209932891
2005-01-01	61.2865894431938
2005-04-01	62.9328885624005
2005-07-01	62.4335364552092
2005-10-01	62.2284092604578
2006-01-01	61.1640992308295
2006-04-01	62.8655478996753
2006-07-01	62.4395612002051
2006-10-01	62.2722425042991
2007-01-01	61.1235397631614
2007-04-01	62.9204183306951
2007-07-01	62.4240499050912
2007-10-01	62.1392163471410
2008-01-01	60.7664411623876
2008-04-01	62.5779383280427
2008-07-01	62.0167301372227
2008-10-01	61.5284273878220
2009-01-01	59.8394938100644
2009-04-01	61.8078076032406
2009-07-01	61.4834320601230
2009-10-01	60.8464248880658
2010-01-01	59.9236213117861
2010-04-01	61.9256042496352
2010-07-01	61.6487457958534
2010-10-01	61.0219100155244
2011-01-01	60.0896529127183
2011-04-01	62.2614121360461
2011-07-01	61.6785671589116
2011-10-01	61.3459177298768
2012-01-01	60.3794070944849
2012-04-01	62.5440583353767
2012-07-01	62.1081131801117
2012-10-01	61.3377817878214
2013-01-01	60.0997466534202
2013-04-01	62.3923214579024
2013-07-01	62.3463429964531
2013-10-01	62.0121707050608
2014-01-01	61.5767909458745
2014-04-01	63.3400391805181
2014-07-01	63.2569209605033
2014-10-01	62.6514094128010
2015-01-01	61.8164615527973
2015-04-01	63.3914539636649
2015-07-01	63.2722596556581
2015-10-01	62.7084785291469
2016-01-01	61.8698677659141
2016-04-01	63.2976211981022
2016-07-01	63.4614325068555
2016-10-01	62.8787163753064
2017-01-01	62.2161332649505
2017-04-01	63.7661241923221
2017-07-01	63.5959358462176
2017-10-01	63.0706729922045
2018-01-01	62.2929569284389
2018-04-01	63.7149884530501
2018-07-01	63.5135637801096