Quarter	Percent, Seasonally Adjusted
1999-01-01	40.3915685903455
1999-04-01	39.5910803682600
1999-07-01	39.0076935231264
1999-10-01	38.3097254336205
2000-01-01	37.8145492119292
2000-04-01	37.3770820111582
2000-07-01	36.8605232393222
2000-10-01	36.5777599325790
2001-01-01	39.2811449706353
2001-04-01	39.2259560164143
2001-07-01	38.4818109532111
2001-10-01	37.9352194041544
2002-01-01	36.3729370490602
2002-04-01	35.3428902158489
2002-07-01	34.6410298161929
2002-10-01	34.4064621406269
2003-01-01	33.6988784900672
2003-04-01	33.1676248796590
2003-07-01	32.4130984283308
2003-10-01	31.9575747611692
2004-01-01	31.7548586053552
2004-04-01	31.3037454660215
2004-07-01	30.6531396086521
2004-10-01	30.1031712468562
2005-01-01	30.6664511977582
2005-04-01	30.2073023772070
2005-07-01	30.2819587509468
2005-10-01	29.7126517466437
2006-01-01	29.0891946298421
2006-04-01	28.4038357226438
2006-07-01	27.9737176773379
2006-10-01	27.4609793376677
2007-01-01	27.1404154672185
2007-04-01	27.0032114547645
2007-07-01	26.4906617021178
2007-10-01	26.1929826439721
2008-01-01	25.6537572761863
2008-04-01	25.1379941928362
2008-07-01	24.5450394362519
2008-10-01	23.6393339029989
2009-01-01	23.1833653932653
2009-04-01	23.0583758617355
2009-07-01	22.6223664257596
2009-10-01	22.3544877697960
2010-01-01	21.8519395680090
2010-04-01	21.3376068213210
2010-07-01	21.0346415733971
2010-10-01	20.7725476894127
2011-01-01	20.7013873017509
2011-04-01	20.1380644599763
2011-07-01	20.2123324581394
2011-10-01	20.0583743887423
2012-01-01	19.1866223204326
2012-04-01	19.3616530604438
2012-07-01	18.6693061711994
2012-10-01	18.4602590526848
2013-01-01	18.3375208059049
2013-04-01	18.3087303625230
2013-07-01	18.1386879419511
2013-10-01	18.1008279571809
2014-01-01	18.0840138450096
2014-04-01	18.0739991084448
2014-07-01	18.0270089179206
2014-10-01	17.8044614128091
2015-01-01	18.0245922119010
2015-04-01	17.6518054416575
2015-07-01	18.2503313590628
2015-10-01	17.8993424745294
2016-01-01	17.8484900925029
2016-04-01	17.5315582741012
2016-07-01	17.5352501664401
2016-10-01	17.8226426756116
2017-01-01	17.7952588344312
2017-04-01	18.2070582704374
2017-07-01	17.9193845808122
2017-10-01	18.0353122010724
2018-01-01	18.1854239609957
2018-04-01	18.0480535293191
2018-07-01	18.1221093716629