Quarter	Percent
2005-01-01	64.4205276608565
2005-04-01	65.3663899128790
2005-07-01	65.7625534218628
2005-10-01	65.5520383823105
2006-01-01	65.0243702266986
2006-04-01	66.0611528279063
2006-07-01	66.4068532089153
2006-10-01	66.2847929236894
2007-01-01	65.6552681888582
2007-04-01	66.5648779604469
2007-07-01	66.7467928707909
2007-10-01	66.6001956566617
2008-01-01	65.9355564184153
2008-04-01	66.7440827730271
2008-07-01	66.6676076992863
2008-10-01	66.0129451306985
2009-01-01	64.4946694526762
2009-04-01	64.8615305317878
2009-07-01	64.8298639797788
2009-10-01	64.4717366151007
2010-01-01	63.7070458511538
2010-04-01	64.6951442165563
2010-07-01	64.8425121752665
2010-10-01	64.5048063277143
2011-01-01	64.0462361649660
2011-04-01	64.9569593158605
2011-07-01	65.0435577032544
2011-10-01	64.9267180872826
2012-01-01	64.1753389166985
2012-04-01	65.1714408185013
2012-07-01	65.3183039467709
2012-10-01	65.1210441397672
2013-01-01	64.3611672774114
2013-04-01	65.3226618907382
2013-07-01	65.4939252828572
2013-10-01	65.4106522728462
2014-01-01	64.9008067572241
2014-04-01	65.7889925977544
2014-07-01	66.0142043217142
2014-10-01	65.9831941728172
2015-01-01	65.5010839588580
2015-04-01	66.3270952894851
2015-07-01	66.5871731573365
2015-10-01	66.6246989283228
2016-01-01	66.2477750631012
2016-04-01	67.0442752965331
2016-07-01	67.3154532572347
2016-10-01	67.2218974397601
2017-01-01	66.8822628173268
2017-04-01	67.7780396358796
2017-07-01	68.0788479907302
2017-10-01	68.0439653701752
2018-01-01	67.7391444761362
2018-04-01	68.5212875150820