Quarter	Percent, Seasonally Adjusted
1999-01-01	48.0400363988768
1999-04-01	47.7932221848443
1999-07-01	47.5240993874180
1999-10-01	47.4213701433148
2000-01-01	47.4084168722753
2000-04-01	47.3064606686937
2000-07-01	47.3516641379374
2000-10-01	47.0522515429638
2001-01-01	47.3133074256717
2001-04-01	47.7259514290530
2001-07-01	47.6182465862346
2001-10-01	47.8603620152442
2002-01-01	47.5444484240196
2002-04-01	47.3852949622006
2002-07-01	47.2463485614684
2002-10-01	47.0105007323982
2003-01-01	46.4739334929399
2003-04-01	46.0575815180953
2003-07-01	46.0189401884855
2003-10-01	45.7890652772605
2004-01-01	45.9997485068917
2004-04-01	46.2562996715188
2004-07-01	46.1906821017467
2004-10-01	45.5988167656869
2005-01-01	45.2541684571498
2005-04-01	44.8606882249336
2005-07-01	44.7466520117158
2005-10-01	44.8441752783331
2006-01-01	44.3482177738929
2006-04-01	44.5161725678556
2006-07-01	44.6278624646843
2006-10-01	44.5992911797556
2007-01-01	44.8467436210387
2007-04-01	45.1218347582842
2007-07-01	45.2132279850096
2007-10-01	45.0456268256086
2008-01-01	45.4089105142593
2008-04-01	45.6314872983227
2008-07-01	45.1292419372075
2008-10-01	44.9356805114291
2009-01-01	45.1999360844897
2009-04-01	45.1433804069571
2009-07-01	45.1115508273654
2009-10-01	44.6364028305725
2010-01-01	43.8965704053647
2010-04-01	43.7314640584728
2010-07-01	43.5681948046685
2010-10-01	43.7316025729185
2011-01-01	43.7794716236730
2011-04-01	43.3331776383410
2011-07-01	43.4120945067410
2011-10-01	43.1175874197317
2012-01-01	42.6288790438112
2012-04-01	42.0149299927479
2012-07-01	41.5367077873339
2012-10-01	41.6643087751026
2013-01-01	41.9347378788013
2013-04-01	41.5144970175738
2013-07-01	41.4103748790915
2013-10-01	40.8362755574744
2014-01-01	39.7588444168579
2014-04-01	39.4078703015809
2014-07-01	39.0902824668523
2014-10-01	38.8797547981529
2015-01-01	38.1976891556866
2015-04-01	37.8917730985584
2015-07-01	37.5792338780760
2015-10-01	37.5386327728737
2016-01-01	37.0976824065525
2016-04-01	36.7161596494897
2016-07-01	36.2805139074181
2016-10-01	36.0143893637926
2017-01-01	36.0995891777813
2017-04-01	35.8140199236558
2017-07-01	35.6442053932400
2017-10-01	35.5669382191036
2018-01-01	35.2505841007217
2018-04-01	35.0085060722695