Quarter	Percent, Seasonally Adjusted
1999-01-01	55.6842318932761
1999-04-01	55.6541766002994
1999-07-01	56.4672206645206
1999-10-01	57.3531723601813
2000-01-01	52.9646178451772
2000-04-01	52.9314962265490
2000-07-01	52.6872363872544
2000-10-01	51.6136781340191
2001-01-01	51.5300707777971
2001-04-01	51.5885426839218
2001-07-01	51.0839457025259
2001-10-01	51.2455194621747
2002-01-01	51.9978191336739
2002-04-01	51.6820823514883
2002-07-01	51.3868875591992
2002-10-01	51.6044240489103
2003-01-01	51.2595980424707
2003-04-01	51.7522474558641
2003-07-01	50.7398795441494
2003-10-01	50.7838562799279
2004-01-01	49.9188826823705
2004-04-01	50.7757169301524
2004-07-01	51.1037922257208
2004-10-01	51.1835672011261
2005-01-01	52.0377497866464
2005-04-01	51.0968552156237
2005-07-01	51.6675805870465
2005-10-01	51.6787936760809
2006-01-01	51.4872953021774
2006-04-01	51.9607916075345
2006-07-01	52.6072123976232
2006-10-01	52.9701081503510
2007-01-01	53.7575547438520
2007-04-01	53.6443370729773
2007-07-01	53.9538930662025
2007-10-01	53.9234169517036
2008-01-01	54.6447684610307
2008-04-01	54.5702187613694
2008-07-01	54.2840349015654
2008-10-01	54.2969416981679
2009-01-01	53.9232240282309
2009-04-01	53.0552107707680
2009-07-01	52.9670658638697
2009-10-01	52.6565798010269
2010-01-01	52.3010672307058
2010-04-01	52.1413468621597
2010-07-01	52.3725538471560
2010-10-01	54.1908409954606
2011-01-01	54.0962349168783
2011-04-01	54.0243716292348
2011-07-01	54.3838176827548
2011-10-01	53.0962191697874
2012-01-01	53.6755340126860
2012-04-01	53.5337118772805
2012-07-01	53.5520329497636
2012-10-01	53.9384535366145
2013-01-01	53.2332389867118
2013-04-01	53.6260453040670
2013-07-01	53.2037406975218
2013-10-01	52.3014390853107
2014-01-01	52.3271037079150
2014-04-01	52.3125449305154
2014-07-01	51.5264580208207
2014-10-01	52.0887379916759
2015-01-01	52.0684799311294
2015-04-01	51.3683801710005
2015-07-01	51.5092012445898
2015-10-01	50.4628719752775
2016-01-01	51.0850881550937
2016-04-01	50.4476759415116
2016-07-01	51.2713834879637
2016-10-01	51.2165407080987
2017-01-01	50.7845087653618
2017-04-01	50.9953280398533
2017-07-01	50.0038311626597
2017-10-01	50.5671542370866
2018-01-01	50.0898551512239
2018-04-01	50.6284228143237