Quarter	Percent
2005-01-01	52.2927754906284
2005-04-01	51.1687617836201
2005-07-01	49.4705627198526
2005-10-01	51.3366942455735
2006-01-01	52.3656746138060
2006-04-01	51.1148492897922
2006-07-01	49.4161954226147
2006-10-01	51.3779095364430
2007-01-01	52.3387705276962
2007-04-01	51.3562376605457
2007-07-01	49.8301657878839
2007-10-01	51.5836147612181
2008-01-01	52.6131518152372
2008-04-01	51.0772525319379
2008-07-01	49.8486412172415
2008-10-01	52.2565627020213
2009-01-01	53.4674071716359
2009-04-01	52.1182132098811
2009-07-01	50.9641751913636
2009-10-01	53.4129555495791
2010-01-01	54.2671169597675
2010-04-01	52.9180442804565
2010-07-01	51.6222282903513
2010-10-01	53.8705239928044
2011-01-01	54.5258715095441
2011-04-01	53.1547262489363
2011-07-01	51.8103455685903
2011-10-01	53.5786894235736
2012-01-01	54.7249201005688
2012-04-01	53.0160461505270
2012-07-01	51.7535485062234
2012-10-01	53.6093167836991
2013-01-01	54.4960357890619
2013-04-01	53.0163370925950
2013-07-01	51.7757076472906
2013-10-01	53.8619947591344
2014-01-01	54.4757690965948
2014-04-01	53.2687932979114
2014-07-01	51.8209284539234
2014-10-01	53.7384480545449
2015-01-01	54.5474697734502
2015-04-01	53.2787210036347
2015-07-01	51.9665018256246
2015-10-01	53.5964457831389
2016-01-01	54.4579251758728
2016-04-01	53.0269542734945
2016-07-01	51.6674885599982
2016-10-01	53.5819157017355
2017-01-01	54.2882080544882
2017-04-01	52.9126200794313
2017-07-01	51.5528762471198
2017-10-01	53.5896514798766
2018-01-01	54.0136803862337
2018-04-01	52.7362534670927