Quarter	Percent, Seasonally Adjusted
1999-01-01	50.6474154371068
1999-04-01	51.1190767321235
1999-07-01	52.0107154943073
1999-10-01	53.0695795923743
2000-01-01	48.3227541607667
2000-04-01	48.0343589860539
2000-07-01	48.2550224788509
2000-10-01	46.8737816260240
2001-01-01	46.8336939009168
2001-04-01	47.5020401225671
2001-07-01	46.3681600202922
2001-10-01	47.1592159792885
2002-01-01	47.3972184180654
2002-04-01	47.2762051606399
2002-07-01	47.3847045170697
2002-10-01	47.3581791374208
2003-01-01	46.5148864868684
2003-04-01	46.8176840320641
2003-07-01	46.5844102393326
2003-10-01	46.2681620459979
2004-01-01	45.5369640569957
2004-04-01	47.3687421518662
2004-07-01	47.8656341745098
2004-10-01	48.3989297156931
2005-01-01	49.6675000387622
2005-04-01	47.6655511887682
2005-07-01	48.2164951303231
2005-10-01	48.5404936770367
2006-01-01	47.6817310615865
2006-04-01	48.6254280497465
2006-07-01	48.9172271488388
2006-10-01	49.9687037542787
2007-01-01	50.9309831436899
2007-04-01	49.9623481543560
2007-07-01	50.9467831447100
2007-10-01	50.7081567725115
2008-01-01	51.5552685812065
2008-04-01	51.1756513934114
2008-07-01	50.8629217945918
2008-10-01	51.7205864882164
2009-01-01	51.6704525415400
2009-04-01	51.0127810080624
2009-07-01	50.2812273071014
2009-10-01	49.1068060861711
2010-01-01	48.6058645831104
2010-04-01	48.9568197868012
2010-07-01	48.6344024238294
2010-10-01	49.5199491958101
2011-01-01	50.0421312998809
2011-04-01	50.0346343104348
2011-07-01	50.1406863953735
2011-10-01	49.0504649166527
2012-01-01	49.6638680752355
2012-04-01	49.2764401585194
2012-07-01	50.4760788776820
2012-10-01	51.6646272076621
2013-01-01	50.0147396917022
2013-04-01	50.0512181459160
2013-07-01	50.2621865983398
2013-10-01	48.6937667453222
2014-01-01	49.2039552795926
2014-04-01	50.5774205033442
2014-07-01	49.2981164221495
2014-10-01	50.4092366046728
2015-01-01	49.8129598933994
2015-04-01	48.6104807868060
2015-07-01	48.7305205618565
2015-10-01	47.7358964229569
2016-01-01	48.7076080699253
2016-04-01	48.6138806026182
2016-07-01	49.4035257152180
2016-10-01	49.2874973687694
2017-01-01	49.6009937287853
2017-04-01	49.9539763083587
2017-07-01	47.9511862636836
2017-10-01	48.5362876661809
2018-01-01	48.1058867843070
2018-04-01	47.4389922489047