Quarter	Percent, Seasonally Adjusted
1999-01-01	58.5751494064660
1999-04-01	58.4044592588589
1999-07-01	58.2889412631032
1999-10-01	58.2525385718327
2000-01-01	58.3269875865124
2000-04-01	58.1961010745564
2000-07-01	58.1289070945383
2000-10-01	57.8174971597073
2001-01-01	58.4512408471652
2001-04-01	58.7473160220048
2001-07-01	58.6104605829109
2001-10-01	58.9029413706999
2002-01-01	58.6633840597904
2002-04-01	58.4866902115311
2002-07-01	58.3885931078370
2002-10-01	58.1611758597825
2003-01-01	57.7871372961977
2003-04-01	57.5045104127461
2003-07-01	57.4160589563652
2003-10-01	57.2673768156636
2004-01-01	57.4262980973961
2004-04-01	57.6292880041766
2004-07-01	57.6489664404566
2004-10-01	57.3231492913901
2005-01-01	57.0838898994465
2005-04-01	56.8696713091253
2005-07-01	56.8169318006768
2005-10-01	56.9018077000061
2006-01-01	56.5322624219301
2006-04-01	56.5950409754354
2006-07-01	56.6440287636469
2006-10-01	56.6302817337401
2007-01-01	56.9101716602831
2007-04-01	57.0605932110989
2007-07-01	57.0989526315426
2007-10-01	57.0272747771995
2008-01-01	57.3817820390992
2008-04-01	57.5264092321273
2008-07-01	57.1299958126670
2008-10-01	57.0326867292717
2009-01-01	57.2682897832936
2009-04-01	57.2314543020477
2009-07-01	57.2645987978305
2009-10-01	56.9077905963560
2010-01-01	56.3137387859703
2010-04-01	56.2141124220594
2010-07-01	56.1090019759320
2010-10-01	56.2653368789123
2011-01-01	56.3132648913163
2011-04-01	55.9924960817513
2011-07-01	56.0580938390036
2011-10-01	55.7778501194930
2012-01-01	55.4914256032400
2012-04-01	55.0483238032140
2012-07-01	54.6936133338784
2012-10-01	54.8866302302033
2013-01-01	55.1456711185466
2013-04-01	54.8910087508958
2013-07-01	54.9188044984422
2013-10-01	54.5333975461685
2014-01-01	53.7768102675262
2014-04-01	53.6216159429242
2014-07-01	53.4464799409611
2014-10-01	53.3203866403001
2015-01-01	52.8269374325591
2015-04-01	52.6403444659064
2015-07-01	52.5418762069335
2015-10-01	52.5630432045398
2016-01-01	52.2761586752890
2016-04-01	52.1243599208370
2016-07-01	51.8587598715861
2016-10-01	51.6051838168402
2017-01-01	51.7841267761855
2017-04-01	51.6188183465330
2017-07-01	51.5720422649075
2017-10-01	51.5435197547196
2018-01-01	51.3227055710754
2018-04-01	51.2408459431837