Quarter	Percent, Seasonally Adjusted
1999-01-01	42.4524746436922
1999-04-01	40.1969611096618
1999-07-01	38.9929695860494
1999-10-01	37.3405822390967
2000-01-01	42.3550218288404
2000-04-01	41.5135882368454
2000-07-01	40.5719380535993
2000-10-01	40.5238278751529
2001-01-01	39.0642806912410
2001-04-01	40.2723436111501
2001-07-01	40.3190411511718
2001-10-01	40.3673641219832
2002-01-01	39.0846208692479
2002-04-01	39.2260431882889
2002-07-01	39.7842502900912
2002-10-01	40.2362760211754
2003-01-01	40.2757931847792
2003-04-01	40.4536455234396
2003-07-01	40.2850994743158
2003-10-01	40.5923780912334
2004-01-01	35.6929381471605
2004-04-01	36.9555581256021
2004-07-01	36.8330050836982
2004-10-01	37.0196389046569
2005-01-01	37.9618408304061
2005-04-01	37.7805889761941
2005-07-01	38.4524855660928
2005-10-01	39.9326074516109
2006-01-01	41.5253848096156
2006-04-01	41.3424783613442
2006-07-01	42.1198193960014
2006-10-01	42.5945943323484
2007-01-01	44.0008911721544
2007-04-01	46.0046871600479
2007-07-01	47.3542172627522
2007-10-01	46.5723442362567
2008-01-01	50.1240491081920
2008-04-01	48.9998685326324
2008-07-01	47.8122658199097
2008-10-01	48.6116039947000
2009-01-01	48.3869079437431
2009-04-01	49.0268920696960
2009-07-01	49.4280683826749
2009-10-01	49.5321792255560
2010-01-01	50.0039372049248
2010-04-01	49.5610443890841
2010-07-01	50.4676801879192
2010-10-01	49.6113266142762
2011-01-01	48.3672331715104
2011-04-01	48.1960170943566
2011-07-01	48.1760591630339
2011-10-01	47.9034079207820
2012-01-01	48.3996087870425
2012-04-01	49.7500203352835
2012-07-01	51.1275231085979
2012-10-01	51.4677973667833
2013-01-01	51.5418205097476
2013-04-01	52.8813436939309
2013-07-01	52.8218229082252
2013-10-01	53.9821888717756
2014-01-01	53.3040996135086
2014-04-01	54.6011450786758
2014-07-01	54.4382412230154
2014-10-01	54.7071374114523
2015-01-01	53.8916962506941
2015-04-01	53.1883674078312
2015-07-01	54.1136853476250
2015-10-01	55.2438483821181
2016-01-01	56.9073143659135
2016-04-01	57.2710410651618
2016-07-01	58.2128609029440
2016-10-01	57.9617506313369
2017-01-01	58.7125199089462
2017-04-01	59.6240787001624
2017-07-01	60.1057145209827
2017-10-01	61.9504154851592
2018-01-01	62.6793077086601
2018-04-01	62.9027886988894