Quarter	Percent, Seasonally Adjusted
1998-01-01	72.1002681982336
1998-04-01	71.8771374917241
1998-07-01	71.8620143200777
1998-10-01	72.0573330835666
1999-01-01	72.0292041908394
1999-04-01	71.9638287846322
1999-07-01	71.9060216025440
1999-10-01	71.9513874717506
2000-01-01	71.7461610101176
2000-04-01	71.4129524147124
2000-07-01	71.1840199954366
2000-10-01	70.9965780589553
2001-01-01	71.2371249597051
2001-04-01	70.8544030971141
2001-07-01	70.7185738836008
2001-10-01	70.5654845728691
2002-01-01	70.4517905799782
2002-04-01	70.6120123510856
2002-07-01	70.6680198796074
2002-10-01	70.7290219460714
2003-01-01	70.4977629828180
2003-04-01	70.3606872411390
2003-07-01	70.0899732377543
2003-10-01	69.9535415803782
2004-01-01	69.9895109394970
2004-04-01	70.0405117172026
2004-07-01	69.9949917352780
2004-10-01	70.0612756615156
2005-01-01	70.1656851486356
2005-04-01	70.3599854805495
2005-07-01	70.5606140840276
2005-10-01	70.5461776533918
2006-01-01	70.6235922095871
2006-04-01	70.4363979962947
2006-07-01	70.2253148621918
2006-10-01	70.0653254235744
2007-01-01	69.9826699412018
2007-04-01	69.8948253906766
2007-07-01	69.7699083012779
2007-10-01	69.7549234700790
2008-01-01	69.6196972406949
2008-04-01	69.7393464236528
2008-07-01	69.5739004798638
2008-10-01	69.7423346172412
2009-01-01	69.8385451148778
2009-04-01	70.0462532373904
2009-07-01	70.2326354183715
2009-10-01	70.2716757591662
2010-01-01	70.0058170077192
2010-04-01	70.0878110915288
2010-07-01	70.2848341670430
2010-10-01	70.2967066181486
2011-01-01	70.2982844307959
2011-04-01	70.6399559314629
2011-07-01	70.6137450321424
2011-10-01	70.5782322097050
2012-01-01	70.8579306705790
2012-04-01	71.3956646111942
2012-07-01	71.9269869240080
2012-10-01	72.1545154840496
2013-01-01	72.4419692000786
2013-04-01	72.9148928362653
2013-07-01	73.0057606386913
2013-10-01	73.1362113430211
2014-01-01	73.2563091077177
2014-04-01	73.2831550015093
2014-07-01	73.5610366591327
2014-10-01	73.9682650611573
2015-01-01	74.0392413585261
2015-04-01	73.9876441906768
2015-07-01	74.0017724591065
2015-10-01	74.0717990025459
2016-01-01	74.5186732373436
2016-04-01	74.8428176390834
2016-07-01	75.1010096558486
2016-10-01	75.5415223435249
2017-01-01	75.6512932801230
2017-04-01	75.6854569498811
2017-07-01	76.1102537041632
2017-10-01	76.0630181136541
2018-01-01	76.2593654466140
2018-04-01	76.5107608521518