Quarter	Percent, Seasonally Adjusted
1998-01-01	66.6218829663218
1998-04-01	66.5127764168955
1998-07-01	66.0347166275972
1998-10-01	65.2588679174340
1999-01-01	65.7876133647431
1999-04-01	65.7263894930214
1999-07-01	66.2706362522028
1999-10-01	66.3754651539582
2000-01-01	66.0046756684427
2000-04-01	65.6019445863534
2000-07-01	65.2641514121350
2000-10-01	65.9936584240153
2001-01-01	66.5098921288358
2001-04-01	67.2698658903025
2001-07-01	67.6775135097864
2001-10-01	68.0491495873365
2002-01-01	68.3815038769084
2002-04-01	68.7606147084539
2002-07-01	69.2267679573295
2002-10-01	69.6760947377240
2003-01-01	69.6168539775340
2003-04-01	69.5118700126489
2003-07-01	69.4559392209451
2003-10-01	71.9605621291504
2004-01-01	67.8726600489978
2004-04-01	67.3692730201746
2004-07-01	68.1376994589842
2004-10-01	69.5467635309612
2005-01-01	70.5642660466580
2005-04-01	71.4212077664177
2005-07-01	71.4921817427030
2005-10-01	71.5901575110908
2006-01-01	71.3556160637880
2006-04-01	73.3609665468974
2006-07-01	73.9885087430737
2006-10-01	73.8446176790454
2007-01-01	75.0875557091521
2007-04-01	74.6183198488526
2007-07-01	74.1053369681228
2007-10-01	74.4590874005681
2008-01-01	74.0723331597717
2008-04-01	73.9335519840874
2008-07-01	74.4560657635984
2008-10-01	75.4326152951917
2009-01-01	75.5185629930094
2009-04-01	76.0192179792750
2009-07-01	76.7935550378838
2009-10-01	76.9872698553934
2010-01-01	76.8007507349449
2010-04-01	76.5789482726952
2010-07-01	77.2832969823901
2010-10-01	76.8505102919143
2011-01-01	77.3087004196419
2011-04-01	77.4888726060050
2011-07-01	77.5059668953234
2011-10-01	76.5266384954293
2012-01-01	75.9046139282381
2012-04-01	76.1703472589330
2012-07-01	75.9216714264721
2012-10-01	76.0226713480945
2013-01-01	76.3043135112780
2013-04-01	76.9411547661150
2013-07-01	76.7034201085261
2013-10-01	76.4424991893930
2014-01-01	76.6940670715676
2014-04-01	76.8227092554445
2014-07-01	76.8156842578743
2014-10-01	77.3346815525259
2015-01-01	77.8393552834058
2015-04-01	78.2441418089589
2015-07-01	78.7757752087974
2015-10-01	78.4280403248502
2016-01-01	77.8127554999476
2016-04-01	77.0253640522304
2016-07-01	76.9543688014420
2016-10-01	77.1920025730252
2017-01-01	77.8461752148500
2017-04-01	77.8569906676703
2017-07-01	77.6551752156849
2017-10-01	78.1730844190439
2018-01-01	77.9880239028386
2018-04-01	78.1921633828790