Quarter	Percent, Seasonally Adjusted
1998-01-01	73.6159269456388
1998-04-01	73.5110929280809
1998-07-01	73.4529479000620
1998-10-01	73.5145890899340
1999-01-01	73.4153159050436
1999-04-01	73.2692886520081
1999-07-01	73.1892259811594
1999-10-01	73.2272696043511
2000-01-01	73.0171652185196
2000-04-01	72.7277823129619
2000-07-01	72.5330460766719
2000-10-01	72.2750003072844
2001-01-01	72.3060140101504
2001-04-01	72.1832405490584
2001-07-01	72.1936464707390
2001-10-01	72.3044009965815
2002-01-01	72.2820627262441
2002-04-01	72.4316154361416
2002-07-01	72.4395065356848
2002-10-01	72.3539701486893
2003-01-01	71.9695890677162
2003-04-01	71.8730843214037
2003-07-01	71.7204116924719
2003-10-01	71.5990219124145
2004-01-01	71.6442297415952
2004-04-01	71.7064554986647
2004-07-01	71.7779898162532
2004-10-01	71.9063505290571
2005-01-01	72.2962698982529
2005-04-01	72.2768108109428
2005-07-01	72.3451951620765
2005-10-01	72.0604020483744
2006-01-01	72.2845700639446
2006-04-01	72.1902447111313
2006-07-01	72.0755271826266
2006-10-01	72.1303561953300
2007-01-01	72.0731786282111
2007-04-01	72.1072680842924
2007-07-01	72.2474404193574
2007-10-01	72.2451307144868
2008-01-01	72.0504594113018
2008-04-01	72.0234304290301
2008-07-01	71.7684034087901
2008-10-01	72.0452715957933
2009-01-01	72.2057367537286
2009-04-01	72.1354241763720
2009-07-01	72.1935721767712
2009-10-01	72.1344035939786
2010-01-01	71.9641273551422
2010-04-01	71.9069679889608
2010-07-01	72.0991014170776
2010-10-01	71.8387397403697
2011-01-01	71.6813768762640
2011-04-01	71.8107982742655
2011-07-01	71.5088081083028
2011-10-01	71.2818286500744
2012-01-01	71.4643554680091
2012-04-01	71.7194193735381
2012-07-01	72.0228234303096
2012-10-01	72.1419040042845
2013-01-01	72.3046923115989
2013-04-01	72.4482712671827
2013-07-01	72.4418635451558
2013-10-01	72.4284955403486
2014-01-01	72.5284967400492
2014-04-01	72.5207160372999
2014-07-01	72.5082551546697
2014-10-01	72.6229824030467
2015-01-01	72.5429233822151
2015-04-01	72.3939658889760
2015-07-01	72.3323284246203
2015-10-01	72.5688353651821
2016-01-01	72.9891501528556
2016-04-01	73.0641096436392
2016-07-01	73.1202963159433
2016-10-01	73.1959246528501
2017-01-01	73.1873590703416
2017-04-01	73.2076819420161
2017-07-01	73.4950940460734
2017-10-01	73.6263037799331
2018-01-01	73.6230508956854
2018-04-01	73.8478912302272