Quarter	Percent, Seasonally Adjusted
1998-01-01	56.6255090270215
1998-04-01	56.0278406981557
1998-07-01	56.0693819683655
1998-10-01	56.1930325578852
1999-01-01	56.6079351224403
1999-04-01	57.2756617282358
1999-07-01	57.1848302843348
1999-10-01	57.9035298637892
2000-01-01	57.3656120647684
2000-04-01	57.4299538837276
2000-07-01	57.7507478408148
2000-10-01	57.4830293275897
2001-01-01	59.0072175661493
2001-04-01	59.4829731066399
2001-07-01	59.4063039112722
2001-10-01	59.7330174386711
2002-01-01	60.1493007208890
2002-04-01	60.1256607255856
2002-07-01	59.5903785639356
2002-10-01	60.4203455871399
2003-01-01	60.3746178531319
2003-04-01	60.9431766180510
2003-07-01	60.7528762909336
2003-10-01	61.0601017882381
2004-01-01	58.6368187570784
2004-04-01	58.8659862898588
2004-07-01	59.8557408754839
2004-10-01	60.1899092975585
2005-01-01	60.1237189728033
2005-04-01	60.6965910512548
2005-07-01	61.9373275705794
2005-10-01	61.9662507771243
2006-01-01	61.4526122555156
2006-04-01	62.0659214697208
2006-07-01	62.9536762410192
2006-10-01	63.1124294473888
2007-01-01	64.3042658870087
2007-04-01	64.0153115341888
2007-07-01	63.5109359056748
2007-10-01	64.2193976403234
2008-01-01	64.4435309308853
2008-04-01	63.1133932977470
2008-07-01	64.1576313524239
2008-10-01	65.3227260747552
2009-01-01	65.8879890771015
2009-04-01	67.0204972863899
2009-07-01	65.6032316187632
2009-10-01	66.3247919026256
2010-01-01	65.9867119331336
2010-04-01	66.6411806757682
2010-07-01	68.5302497698126
2010-10-01	67.5736094229637
2011-01-01	68.0229939363716
2011-04-01	69.8486180534617
2011-07-01	69.2287672015230
2011-10-01	68.0283880367699
2012-01-01	66.8504648897918
2012-04-01	66.4391833154590
2012-07-01	67.2537583212241
2012-10-01	67.9095067563041
2013-01-01	68.6829100020465
2013-04-01	69.0780076963791
2013-07-01	69.7212533192032
2013-10-01	69.7736082432218
2014-01-01	68.9943792645048
2014-04-01	68.9958088406790
2014-07-01	68.6050303792404
2014-10-01	69.4376885754663
2015-01-01	69.7793011702440
2015-04-01	69.9188156745189
2015-07-01	69.3871548816306
2015-10-01	69.1295928413166
2016-01-01	70.1630789725600
2016-04-01	69.3531363504060
2016-07-01	70.1806871048524
2016-10-01	69.3833710103556
2017-01-01	69.9748772404497
2017-04-01	70.5160001035174
2017-07-01	69.5938601579085
2017-10-01	70.0267655192210
2018-01-01	69.7845182506967
2018-04-01	69.5117704060566