Quarter	Percent, Seasonally Adjusted
1998-01-01	37.5618966376714
1998-04-01	37.6669438935572
1998-07-01	37.9758026091061
1998-10-01	37.4725698027294
1999-01-01	37.2566334011989
1999-04-01	37.0179436916575
1999-07-01	36.9876835856925
1999-10-01	36.8519088825045
2000-01-01	36.2724263372954
2000-04-01	36.3538783480936
2000-07-01	35.8053452990131
2000-10-01	35.9755583622289
2001-01-01	35.2204935887047
2001-04-01	35.4361531607588
2001-07-01	35.3529599664792
2001-10-01	34.9707187338598
2002-01-01	35.0282918858913
2002-04-01	34.6262406940712
2002-07-01	34.1608430061496
2002-10-01	33.9446884164182
2003-01-01	33.4068079920724
2003-04-01	33.4619701126664
2003-07-01	33.8295494612925
2003-10-01	33.6816402573013
2004-01-01	33.7817359088760
2004-04-01	33.4743948558480
2004-07-01	33.0081588687538
2004-10-01	32.5831703969585
2005-01-01	32.6087535159234
2005-04-01	32.4200412690189
2005-07-01	32.0291842349478
2005-10-01	31.9190719440081
2006-01-01	32.0159686553708
2006-04-01	31.7933964136120
2006-07-01	31.5600115191007
2006-10-01	31.6321970902066
2007-01-01	31.4964594242036
2007-04-01	31.5100938311434
2007-07-01	31.0407760929644
2007-10-01	31.0251523470878
2008-01-01	31.4013528768752
2008-04-01	30.8580052697919
2008-07-01	30.9634483889883
2008-10-01	31.3315524966032
2009-01-01	30.9630424642883
2009-04-01	31.3184328935942
2009-07-01	31.2871619261703
2009-10-01	30.9453773720068
2010-01-01	30.2635441791126
2010-04-01	30.2333098954765
2010-07-01	30.2730278536966
2010-10-01	30.4446023755370
2011-01-01	30.3606462289450
2011-04-01	30.0386198812506
2011-07-01	30.7275986705976
2011-10-01	30.8963785527946
2012-01-01	30.3894420977128
2012-04-01	30.1668308723004
2012-07-01	30.0438476622881
2012-10-01	30.5230562465618
2013-01-01	30.6998264436604
2013-04-01	30.4087034978079
2013-07-01	30.1951151108519
2013-10-01	29.5962567920944
2014-01-01	30.1983676999561
2014-04-01	30.0128062499169
2014-07-01	29.7603649833333
2014-10-01	30.0399266229337
2015-01-01	29.6545126685708
2015-04-01	29.6279763773699
2015-07-01	29.6220834695379
2015-10-01	29.7772278904812
2016-01-01	29.5601985782701
2016-04-01	29.9005193989628
2016-07-01	29.3208952153031
2016-10-01	29.1244344357882
2017-01-01	28.9073257330710
2017-04-01	28.6396278599368
2017-07-01	27.9414041081928
2017-10-01	27.9787087619449
2018-01-01	27.8709496104358
2018-04-01	27.6342428542673