Quarter	Percent, Seasonally Adjusted
1998-01-01	45.7938532044679
1998-04-01	46.6248455356821
1998-07-01	46.5881305086154
1998-10-01	46.9238669653871
1999-01-01	47.5420304441283
1999-04-01	48.0130007940878
1999-07-01	49.3204862162391
1999-10-01	49.5171054212165
2000-01-01	50.0850241795664
2000-04-01	51.3249895086583
2000-07-01	52.1616923056327
2000-10-01	53.1923942457263
2001-01-01	53.8139330171336
2001-04-01	54.6332903445448
2001-07-01	55.0098043402202
2001-10-01	55.9177398369224
2002-01-01	57.0139130507019
2002-04-01	56.9269691569554
2002-07-01	57.9738609682049
2002-10-01	59.0665749345917
2003-01-01	59.6207939829713
2003-04-01	60.3330205160621
2003-07-01	60.8819184695634
2003-10-01	60.7853008229467
2004-01-01	61.4048659886369
2004-04-01	61.2535517232593
2004-07-01	61.2475340164118
2004-10-01	61.2014644141910
2005-01-01	60.2886015891713
2005-04-01	61.3358742054570
2005-07-01	61.4664985802084
2005-10-01	61.4845101631270
2006-01-01	61.8134150467195
2006-04-01	62.2600617713182
2006-07-01	62.4898363363520
2006-10-01	62.5648468235407
2007-01-01	62.6158609679634
2007-04-01	63.1752212009545
2007-07-01	63.5446843225693
2007-10-01	63.7542538054577
2008-01-01	64.1901184714477
2008-04-01	64.0830549344852
2008-07-01	64.2023067407848
2008-10-01	63.9763533589079
2009-01-01	63.4243944466730
2009-04-01	62.6776664602446
2009-07-01	62.4536458236748
2009-10-01	62.4444655052936
2010-01-01	63.2573925176502
2010-04-01	63.8283302077974
2010-07-01	63.8553951776729
2010-10-01	64.3176068825866
2011-01-01	64.9691887149472
2011-04-01	64.4076409952227
2011-07-01	64.1749099399039
2011-10-01	64.5795979869253
2012-01-01	63.6233441722086
2012-04-01	63.2356415522289
2012-07-01	63.8607920877381
2012-10-01	63.5779429923534
2013-01-01	63.4857053424671
2013-04-01	63.8523768097588
2013-07-01	62.8410603103084
2013-10-01	62.6714656446516
2014-01-01	62.3589663027073
2014-04-01	61.7305309104821
2014-07-01	61.7398741164319
2014-10-01	61.9325513908586
2015-01-01	62.0529819197400
2015-04-01	62.7684964022232
2015-07-01	63.3762536249692
2015-10-01	62.3562636057506
2016-01-01	62.6234594004353
2016-04-01	62.3066330305578
2016-07-01	62.2841166111709
2016-10-01	62.8873169370717
2017-01-01	63.0251066661814
2017-04-01	63.1072172309060
2017-07-01	63.3263207973680
2017-10-01	64.6493577502015
2018-01-01	65.2196966981460
2018-04-01	66.1973939832410