Quarter	Percent, Seasonally Adjusted
1998-01-01	23.2262129637171
1998-04-01	23.0560573690512
1998-07-01	22.7493063695633
1998-10-01	22.5947035134811
1999-01-01	21.8427203377657
1999-04-01	22.0442859205920
1999-07-01	22.2746369728301
1999-10-01	22.2077323399399
2000-01-01	22.0896417363086
2000-04-01	21.8780536881165
2000-07-01	21.7791788493542
2000-10-01	21.7740553011641
2001-01-01	21.7665937135452
2001-04-01	22.2251542694273
2001-07-01	22.2982936947284
2001-10-01	22.1967906578770
2002-01-01	21.9709271440869
2002-04-01	21.2900003963661
2002-07-01	21.0244785026809
2002-10-01	20.5926744694099
2003-01-01	20.4992185928551
2003-04-01	20.4420749695579
2003-07-01	20.0305235185999
2003-10-01	19.8001567296507
2004-01-01	19.0964437619101
2004-04-01	18.9697681622595
2004-07-01	18.7366733007897
2004-10-01	18.6712655639000
2005-01-01	18.7152363529156
2005-04-01	18.5273993484293
2005-07-01	18.5991041260000
2005-10-01	18.2601129735896
2006-01-01	18.2808198294050
2006-04-01	18.2370809481664
2006-07-01	17.8365473785617
2006-10-01	17.8351310722089
2007-01-01	18.0681230670428
2007-04-01	18.1825334914350
2007-07-01	18.1928635903015
2007-10-01	18.1741449835193
2008-01-01	18.0190817999363
2008-04-01	18.0793954246987
2008-07-01	18.1567656324576
2008-10-01	18.0050725643166
2009-01-01	17.5838584633678
2009-04-01	17.3426229294000
2009-07-01	17.1095512354354
2009-10-01	16.9525646325686
2010-01-01	16.7651146791089
2010-04-01	16.6623830861782
2010-07-01	16.8290636968102
2010-10-01	16.7684286907358
2011-01-01	16.8719503245299
2011-04-01	17.2258682457844
2011-07-01	16.9336307460008
2011-10-01	16.4781175398465
2012-01-01	16.3660653024659
2012-04-01	16.4125437834773
2012-07-01	16.2610716556950
2012-10-01	15.9657114054068
2013-01-01	16.2669409070516
2013-04-01	15.9556573485528
2013-07-01	16.0313303402151
2013-10-01	16.1967448796076
2014-01-01	15.7722383784440
2014-04-01	15.8012420780025
2014-07-01	15.6007039854609
2014-10-01	15.4765194930426
2015-01-01	15.2567000392024
2015-04-01	14.7434431142169
2015-07-01	14.3328416726867
2015-10-01	14.2011471156124
2016-01-01	14.3268084525218
2016-04-01	14.4077871792314
2016-07-01	14.4258905918604
2016-10-01	15.0182611415020
2017-01-01	15.1166186575819
2017-04-01	14.7113147158141
2017-07-01	14.9768803876522
2017-10-01	15.2037620885207
2018-01-01	15.3244755036378
2018-04-01	14.9711092369711