Quarter	Percent, Seasonally Adjusted
1998-01-01	39.3966745295436
1998-04-01	39.3881378950829
1998-07-01	39.7539120952991
1998-10-01	39.4128696793856
1999-01-01	39.4714202954597
1999-04-01	39.3164031266407
1999-07-01	39.3470120055792
1999-10-01	39.2782690849042
2000-01-01	39.0049817684496
2000-04-01	39.1628812713476
2000-07-01	38.7090764187558
2000-10-01	38.6950949058291
2001-01-01	38.4553056918947
2001-04-01	38.5565244652418
2001-07-01	38.4488062943355
2001-10-01	38.2757295256537
2002-01-01	38.2036507817241
2002-04-01	37.9667573739009
2002-07-01	37.7850987939488
2002-10-01	38.0470111787895
2003-01-01	37.8869827909203
2003-04-01	37.9870728044540
2003-07-01	38.0943550474024
2003-10-01	38.1936566980726
2004-01-01	38.4811422007431
2004-04-01	38.4489883878165
2004-07-01	38.3778319600166
2004-10-01	38.3028439564515
2005-01-01	38.3264185011324
2005-04-01	38.1734794200879
2005-07-01	38.0618585152782
2005-10-01	37.9812676403230
2006-01-01	38.0629552416428
2006-04-01	37.8610847526661
2006-07-01	37.8226064190859
2006-10-01	37.9574337438580
2007-01-01	37.7836725184180
2007-04-01	37.9562476514726
2007-07-01	37.5773808358702
2007-10-01	37.8070249889501
2008-01-01	37.8988264800887
2008-04-01	37.7698361691285
2008-07-01	37.9704307758212
2008-10-01	38.2134900387549
2009-01-01	38.3784277327721
2009-04-01	38.5875990481530
2009-07-01	38.8908133627699
2009-10-01	38.7126012925500
2010-01-01	38.4222962497267
2010-04-01	38.7419760158468
2010-07-01	38.9038251287315
2010-10-01	39.0051425930766
2011-01-01	39.2269047440066
2011-04-01	39.1736337839112
2011-07-01	39.5505441334469
2011-10-01	39.9987174773259
2012-01-01	39.8676653167866
2012-04-01	39.6126928840959
2012-07-01	39.5790352953887
2012-10-01	40.3100204136350
2013-01-01	40.7489447326362
2013-04-01	40.6598869101772
2013-07-01	40.7092184879051
2013-10-01	40.6866391551060
2014-01-01	41.2618159484431
2014-04-01	40.9960243277966
2014-07-01	40.9334689498008
2014-10-01	41.5131256378404
2015-01-01	41.4069642437965
2015-04-01	41.3543159090598
2015-07-01	41.4978564154917
2015-10-01	41.3594452739081
2016-01-01	41.7677086945688
2016-04-01	41.7378627944887
2016-07-01	41.2594445853653
2016-10-01	41.4147529617854
2017-01-01	41.3953768379525
2017-04-01	41.0220955146098
2017-07-01	40.8208767677212
2017-10-01	40.9391958914067
2018-01-01	40.9772467214207
2018-04-01	40.9678332713025