Quarter	Percent, Seasonally Adjusted
1998-01-01	37.1259995416259
1998-04-01	37.3486221911429
1998-07-01	36.7956489218055
1998-10-01	37.2954214114501
1999-01-01	37.3772179375545
1999-04-01	37.4565587860495
1999-07-01	37.5246461324232
1999-10-01	37.7921318211092
2000-01-01	36.8073441530632
2000-04-01	35.9588740073152
2000-07-01	36.3281646574343
2000-10-01	35.9548811606574
2001-01-01	36.2626297847859
2001-04-01	36.8142330384985
2001-07-01	37.1906259520770
2001-10-01	38.0128741762580
2002-01-01	39.4516248740345
2002-04-01	40.2041545528839
2002-07-01	41.4512290281747
2002-10-01	41.8201549279974
2003-01-01	42.0094065153072
2003-04-01	42.2148194502800
2003-07-01	42.8003660981194
2003-10-01	42.0396741893285
2004-01-01	42.4881160206553
2004-04-01	42.4153631796391
2004-07-01	42.8429061755359
2004-10-01	42.8538267891095
2005-01-01	44.0335514134414
2005-04-01	44.1062745191061
2005-07-01	45.1818640466185
2005-10-01	44.5375511504229
2006-01-01	45.4123084023610
2006-04-01	45.2795799220182
2006-07-01	45.3353463469454
2006-10-01	44.7648087600178
2007-01-01	45.3664203980163
2007-04-01	45.6820253198523
2007-07-01	46.4211852216138
2007-10-01	46.5284485307060
2008-01-01	47.1034370538080
2008-04-01	47.7669594764587
2008-07-01	47.5306847066210
2008-10-01	48.0252213498804
2009-01-01	47.8108046997022
2009-04-01	47.3146019075330
2009-07-01	46.3892486829326
2009-10-01	45.8296131284236
2010-01-01	46.0443223326743
2010-04-01	46.2730449803050
2010-07-01	46.4583289871027
2010-10-01	47.2124534561373
2011-01-01	47.3954517542042
2011-04-01	48.0986024539201
2011-07-01	47.7597658735387
2011-10-01	47.3694852678382
2012-01-01	47.5958929360629
2012-04-01	49.0539316095241
2012-07-01	50.3955752310612
2012-10-01	50.3167452842618
2013-01-01	50.4640917101387
2013-04-01	51.3747276864710
2013-07-01	52.1342582062586
2013-10-01	52.5535841259656
2014-01-01	52.7989211350258
2014-04-01	53.5887053682559
2014-07-01	54.6568991346177
2014-10-01	55.0265496110057
2015-01-01	54.6174902131466
2015-04-01	55.5884480381374
2015-07-01	55.8390256090976
2015-10-01	55.7886770635386
2016-01-01	56.6201577788890
2016-04-01	58.1114102300959
2016-07-01	58.9600932865497
2016-10-01	60.3956259251923
2017-01-01	60.9696348489257
2017-04-01	61.5652599091848
2017-07-01	62.5220345514886
2017-10-01	63.4216540072706
2018-01-01	64.4536231045334
2018-04-01	65.0956221679264