Quarter	Percent, Seasonally Adjusted
1999-01-01	37.8440601444727
1999-04-01	38.0783559328192
1999-07-01	38.0315510386202
1999-10-01	38.2123309794965
2000-01-01	37.9238144419396
2000-04-01	38.2077638508318
2000-07-01	37.9691001791525
2000-10-01	37.8309811433185
2001-01-01	38.0212899783521
2001-04-01	37.3803328876528
2001-07-01	37.5585227174296
2001-10-01	36.9267249707566
2002-01-01	36.3221256222012
2002-04-01	36.4932936052436
2002-07-01	36.2328631160514
2002-10-01	35.9815467206755
2003-01-01	36.1250598779977
2003-04-01	35.4142492957732
2003-07-01	35.5697215672145
2003-10-01	35.7412541856041
2004-01-01	37.0470391811656
2004-04-01	36.7838712731306
2004-07-01	36.3061449368809
2004-10-01	35.8560562192888
2005-01-01	35.5965523904268
2005-04-01	35.2662618914733
2005-07-01	34.7851390907465
2005-10-01	34.7370955509040
2006-01-01	34.5419948258846
2006-04-01	34.0991731057846
2006-07-01	33.9432510172922
2006-10-01	33.5688926361101
2007-01-01	33.2739105537880
2007-04-01	33.0744422718088
2007-07-01	32.5595386662564
2007-10-01	32.7342604196618
2008-01-01	32.4739607304833
2008-04-01	32.3639504811260
2008-07-01	32.2665474011074
2008-10-01	31.5503751920155
2009-01-01	31.4825325335130
2009-04-01	31.1526562357599
2009-07-01	31.0085015650624
2009-10-01	31.3994520391173
2010-01-01	31.2940942575851
2010-04-01	31.1630073088791
2010-07-01	31.0810217400497
2010-10-01	30.8668601583838
2011-01-01	30.7523927824082
2011-04-01	30.9138079789032
2011-07-01	30.8941701065679
2011-10-01	30.3659630918858
2012-01-01	30.2142675063718
2012-04-01	30.0798486997312
2012-07-01	29.7514452827706
2012-10-01	29.7602925633437
2013-01-01	29.6005678203934
2013-04-01	29.3504658232618
2013-07-01	29.1302658814258
2013-10-01	29.3161683910016
2014-01-01	28.9756004741898
2014-04-01	28.8794826951580
2014-07-01	29.6322214817256
2014-10-01	29.2939076482098
2015-01-01	29.3978020018622
2015-04-01	29.1794308761108
2015-07-01	29.0662794253171
2015-10-01	28.7516105233271
2016-01-01	28.5222325156157
2016-04-01	28.3478270171703
2016-07-01	28.0584564881090
2016-10-01	28.3304433300014
2017-01-01	28.2453039344866
2017-04-01	28.1035400237937
2017-07-01	28.3125281306106
2017-10-01	28.0130827486938
2018-01-01	28.0842570029207
2018-04-01	28.2194548862864