Quarter	Percent, Seasonally Adjusted
1998-01-01	39.1213318595477
1998-04-01	39.2865531225034
1998-07-01	39.7899166990942
1998-10-01	40.0660314420391
1999-01-01	40.5498073629050
1999-04-01	40.1892465765113
1999-07-01	40.0685605160784
1999-10-01	40.4383978604347
2000-01-01	40.0678673886479
2000-04-01	40.1710303591453
2000-07-01	40.4581277759499
2000-10-01	40.4945929363476
2001-01-01	40.0452622435425
2001-04-01	39.3425949041773
2001-07-01	39.3018729910660
2001-10-01	39.1532230489760
2002-01-01	39.5625661419657
2002-04-01	39.9508951586083
2002-07-01	40.3456213404839
2002-10-01	40.5664189292355
2003-01-01	40.5394111731768
2003-04-01	40.6411546190348
2003-07-01	40.9252295788893
2003-10-01	41.1859288581034
2004-01-01	41.8313667333557
2004-04-01	41.9927056207922
2004-07-01	42.0621656135470
2004-10-01	42.1713317711961
2005-01-01	41.8649558272219
2005-04-01	42.0978564027563
2005-07-01	42.2315510506698
2005-10-01	42.3501720371420
2006-01-01	42.3421073908899
2006-04-01	42.3066801700278
2006-07-01	42.6588825245743
2006-10-01	42.4466106376782
2007-01-01	42.3976409013398
2007-04-01	42.3886967526686
2007-07-01	42.3172779205358
2007-10-01	42.3020333122814
2008-01-01	42.2571520749968
2008-04-01	42.3287732780968
2008-07-01	42.3743131030018
2008-10-01	42.7364520501262
2009-01-01	43.2157401863415
2009-04-01	43.3667000856590
2009-07-01	43.6692122593948
2009-10-01	43.7384498020439
2010-01-01	43.9789248311052
2010-04-01	44.0990486506119
2010-07-01	44.1268740372986
2010-10-01	44.1183683670990
2011-01-01	43.9161498138889
2011-04-01	43.6120834833402
2011-07-01	43.5868744273022
2011-10-01	43.9924440307229
2012-01-01	43.8957090413968
2012-04-01	43.9518810071271
2012-07-01	44.0996708357944
2012-10-01	43.9854596072476
2013-01-01	43.6491512679130
2013-04-01	43.9684472928701
2013-07-01	43.8403417342131
2013-10-01	43.5490146418504
2014-01-01	44.0299751044924
2014-04-01	44.1649653412184
2014-07-01	44.0797735055318
2014-10-01	44.1289052374077
2015-01-01	44.4191358771949
2015-04-01	44.7586637125052
2015-07-01	44.8616081023189
2015-10-01	44.9267438292197
2016-01-01	45.0863910938225
2016-04-01	45.0114342003015
2016-07-01	45.1766923330241
2016-10-01	44.7828372458298
2017-01-01	44.8908565501950
2017-04-01	44.9385812327866
2017-07-01	44.5839392790871
2017-10-01	44.5389138488290
2018-01-01	44.3291391533949
2018-04-01	44.3686031123732