Quarter	Percent, Seasonally Adjusted
1998-01-01	45.0683721212246
1998-04-01	44.3180016895317
1998-07-01	44.1654213936539
1998-10-01	43.3764084789614
1999-01-01	42.3798183283735
1999-04-01	42.0828712674172
1999-07-01	41.8053360359588
1999-10-01	42.1855486389947
2000-01-01	42.1058985602545
2000-04-01	41.7599074457398
2000-07-01	41.4375161352390
2000-10-01	41.5501843968175
2001-01-01	38.1394102603356
2001-04-01	38.8389665494277
2001-07-01	39.5706097745679
2001-10-01	39.0927139078242
2002-01-01	39.1998040737603
2002-04-01	39.2185641680120
2002-07-01	38.7389487632680
2002-10-01	38.2158417222036
2003-01-01	38.7631537627407
2003-04-01	38.2098341471448
2003-07-01	37.0804810307862
2003-10-01	35.9968459536005
2004-01-01	41.1519972718118
2004-04-01	40.1097991644977
2004-07-01	38.8200445048529
2004-10-01	38.7654218987137
2005-01-01	37.8696162000879
2005-04-01	36.8683018883455
2005-07-01	36.3031971536804
2005-10-01	36.6051712233148
2006-01-01	36.8968321848586
2006-04-01	36.2253200419915
2006-07-01	35.1416940298090
2006-10-01	34.7053255747446
2007-01-01	34.8933877922413
2007-04-01	34.3662809913303
2007-07-01	34.5338665128681
2007-10-01	33.9332544096776
2008-01-01	33.4037303288593
2008-04-01	34.0559684870279
2008-07-01	34.2777358470449
2008-10-01	34.3447942978472
2009-01-01	34.3290798150074
2009-04-01	33.8235071686513
2009-07-01	34.1243522250034
2009-10-01	33.4058996909508
2010-01-01	33.2929273694107
2010-04-01	33.3787137446125
2010-07-01	32.8539798655246
2010-10-01	32.5743160655952
2011-01-01	32.0002774900670
2011-04-01	31.5509128302051
2011-07-01	31.7392780829577
2011-10-01	31.4704391076705
2012-01-01	31.5692077723272
2012-04-01	31.2528450014478
2012-07-01	30.6739136330444
2012-10-01	31.4356548076499
2013-01-01	31.8924604402958
2013-04-01	31.6124188972286
2013-07-01	31.5608579250962
2013-10-01	31.1724857972656
2014-01-01	29.9556442533061
2014-04-01	30.1125566040960
2014-07-01	30.2285647110816
2014-10-01	29.6382680128168
2015-01-01	29.1754283353341
2015-04-01	27.9163106087225
2015-07-01	26.8969887646077
2015-10-01	26.6531854836607
2016-01-01	26.3514477899083
2016-04-01	26.2808280645594
2016-07-01	26.5182401316183
2016-10-01	26.5803309674632
2017-01-01	26.5670914860023
2017-04-01	26.5609887599438
2017-07-01	26.1634919602870
2017-10-01	25.3454246011567
2018-01-01	25.4111484238236
2018-04-01	25.2789140011474