Quarter	Percent, Seasonally Adjusted
1999-04-01	22.8271130426418
1999-07-01	22.6036014915271
1999-10-01	22.1412407217914
2000-01-01	21.8889659340714
2000-04-01	21.6682320971461
2000-07-01	21.6200130412680
2000-10-01	21.5057279287035
2001-01-01	21.4958595015212
2001-04-01	21.1857611049640
2001-07-01	20.8046354761211
2001-10-01	20.7684926618080
2002-01-01	20.7099083195118
2002-04-01	20.6397092507582
2002-07-01	21.2569669822067
2002-10-01	21.1488179466455
2003-01-01	20.9736418979744
2003-04-01	20.9911573938405
2003-07-01	20.9616062863288
2003-10-01	20.6160167065963
2004-01-01	20.3460575376791
2004-04-01	20.1884312804948
2004-07-01	20.1596362713278
2004-10-01	19.7132291890383
2005-01-01	19.4954832392061
2005-04-01	19.1535045899848
2005-07-01	18.8749566900331
2005-10-01	18.8068756772057
2006-01-01	18.7005084757339
2006-04-01	18.7422577690132
2006-07-01	18.5897617285223
2006-10-01	18.3325069386083
2007-01-01	17.8413785336717
2007-04-01	17.9490936062986
2007-07-01	17.8482140874056
2007-10-01	18.0025191070193
2008-01-01	17.8801476539552
2008-04-01	18.1969156680078
2008-07-01	18.0617071536367
2008-10-01	17.9591553617224
2009-01-01	18.8092214252840
2009-04-01	18.7376350483512
2009-07-01	18.5336310926287
2009-10-01	19.1668198319305
2010-01-01	19.2033779177910
2010-04-01	19.0956770084649
2010-07-01	19.3120613269961
2010-10-01	19.6825548668839
2011-01-01	19.8898472991651
2011-04-01	19.4914330533454
2011-07-01	19.4291134021365
2011-10-01	19.4203146159641
2012-01-01	19.1053784692925
2012-04-01	19.5123855252121
2012-07-01	19.2141023218493
2012-10-01	19.4026645290359
2013-01-01	19.1029571065960
2013-04-01	18.5015435041879
2013-07-01	18.5511150462713
2013-10-01	18.5350130995420
2014-01-01	18.2600466135782
2014-04-01	18.4196532632364
2014-07-01	18.1972095240274
2014-10-01	18.2725135503983
2015-01-01	18.3850902186336
2015-04-01	17.9495454574677
2015-07-01	18.1785432926038
2015-10-01	17.9324018574331
2016-01-01	18.2157866037531
2016-04-01	18.1704238016379
2016-07-01	17.9869399466783
2016-10-01	18.1282601627959
2017-01-01	17.6467773303968
2017-04-01	18.1272314497657
2017-07-01	16.4825619272438
2017-10-01	16.5714982830647
2018-01-01	16.7811187259283
2018-04-01	16.8927922172714