Quarter	Percent, Seasonally Adjusted
1998-01-01	67.2532805886566
1998-04-01	65.7330182694283
1998-07-01	67.7665502912418
1998-10-01	68.2239768087153
1999-01-01	68.4506040476315
1999-04-01	69.5867721458507
1999-07-01	69.2060287288375
1999-10-01	69.2171379254934
2000-01-01	69.2713171526715
2000-04-01	70.3935964130510
2000-07-01	70.3986355474806
2000-10-01	70.2911160321558
2001-01-01	70.8020597258726
2001-04-01	70.9077695988163
2001-07-01	70.7069744603512
2001-10-01	70.8293400505493
2002-01-01	70.1890694076031
2002-04-01	70.1358841441622
2002-07-01	69.6709235880240
2002-10-01	69.8184073725849
2003-01-01	69.5847933763287
2003-04-01	69.5734863804544
2003-07-01	70.0232173414477
2003-10-01	69.4611430373300
2004-01-01	69.6755487206913
2004-04-01	69.4698925003617
2004-07-01	69.8303483748195
2004-10-01	69.8099802253615
2005-01-01	69.9799755759986
2005-04-01	70.0243530760105
2005-07-01	70.0809040424971
2005-10-01	70.9928716916318
2006-01-01	71.2136009639977
2006-04-01	70.7063072141170
2006-07-01	71.7995284430624
2006-10-01	71.8069679174937
2007-01-01	71.3517006339032
2007-04-01	72.1912798740572
2007-07-01	72.5476132076331
2007-10-01	72.3807440296812
2008-01-01	73.0997928144913
2008-04-01	73.5273546196973
2008-07-01	73.0851691297074
2008-10-01	72.8829158780546
2009-01-01	71.0657736390478
2009-04-01	69.5330458703563
2009-07-01	68.8006740867378
2009-10-01	68.6016058458078
2010-01-01	69.1213174951682
2010-04-01	69.1773061641497
2010-07-01	69.4583236971587
2010-10-01	69.7267700258283
2011-01-01	70.4820422812199
2011-04-01	70.7500005574793
2011-07-01	70.2993152356663
2011-10-01	70.8305101201784
2012-01-01	70.7111072283072
2012-04-01	70.5505594778915
2012-07-01	70.3874443193456
2012-10-01	70.5496260940116
2013-01-01	69.7376444868084
2013-04-01	70.2478825420400
2013-07-01	70.0970404508066
2013-10-01	69.5845401445043
2014-01-01	69.7309923462920
2014-04-01	69.6525756926189
2014-07-01	69.0357047092783
2014-10-01	69.5043653384029
2015-01-01	69.5478879365048
2015-04-01	69.0692624953961
2015-07-01	69.4337050544577
2015-10-01	69.2450822483048
2016-01-01	70.1669908344994
2016-04-01	70.6668860321961
2016-07-01	70.5629114649157
2016-10-01	70.6496442472688
2017-01-01	70.5721342003022
2017-04-01	70.9836471810126
2017-07-01	71.5678919068724
2017-10-01	72.3063453360935
2018-01-01	72.8118905591004
2018-04-01	73.0879008087588