Quarter	Percent, Seasonally Adjusted
1999-01-01	39.0360818377988
1999-04-01	38.8627311757156
1999-07-01	38.7443321726703
1999-10-01	38.6470985736407
2000-01-01	38.6573474459786
2000-04-01	38.4429669771593
2000-07-01	38.2630834800184
2000-10-01	38.0070080519562
2001-01-01	38.6888162923899
2001-04-01	39.0745803162217
2001-07-01	39.1675312760002
2001-10-01	39.3467839681037
2002-01-01	39.2498847708791
2002-04-01	39.2406889974607
2002-07-01	39.1497478558570
2002-10-01	39.0440713925462
2003-01-01	38.9433729992210
2003-04-01	38.5024496116230
2003-07-01	38.4870819900505
2003-10-01	38.5956265729978
2004-01-01	38.5569566638370
2004-04-01	38.8434676719082
2004-07-01	38.9196422130117
2004-10-01	38.7393702686081
2005-01-01	38.5087225533002
2005-04-01	38.5050741480796
2005-07-01	38.0891604425633
2005-10-01	37.9355448812840
2006-01-01	37.7691982365048
2006-04-01	37.4390610549648
2006-07-01	37.5826361022258
2006-10-01	37.2218887167460
2007-01-01	37.3950643684502
2007-04-01	37.6114994515225
2007-07-01	37.8492411822679
2007-10-01	38.0888645660048
2008-01-01	38.3737275669619
2008-04-01	38.4154689692730
2008-07-01	38.1476707677024
2008-10-01	38.5873478769558
2009-01-01	38.5832556775618
2009-04-01	38.4947802804022
2009-07-01	38.7704051853397
2009-10-01	38.6090801664248
2010-01-01	38.6935881596800
2010-04-01	38.6604340229051
2010-07-01	38.6739206114066
2010-10-01	38.5325462515224
2011-01-01	38.4056926679326
2011-04-01	38.2971191135218
2011-07-01	37.9357788302238
2011-10-01	37.8029658085182
2012-01-01	37.6116154823546
2012-04-01	37.2732075484283
2012-07-01	37.0744854394079
2012-10-01	36.6019264342022
2013-01-01	37.1040296052613
2013-04-01	36.2372459563392
2013-07-01	35.7165276004146
2013-10-01	35.4135112308079
2014-01-01	34.6052894753259
2014-04-01	34.4865365927830
2014-07-01	34.0459636051268
2014-10-01	33.8794364883669
2015-01-01	33.5049885502209
2015-04-01	33.0626699209271
2015-07-01	32.5699570733110
2015-10-01	32.2296118638983
2016-01-01	31.8378966403380
2016-04-01	31.5287092004936
2016-07-01	31.3886474889176
2016-10-01	31.0128064200964
2017-01-01	30.9455592235334
2017-04-01	30.4380272954581
2017-07-01	30.2928467197433
2017-10-01	30.0620204807351
2018-01-01	29.8185107072467
2018-04-01	29.8835039680901