Quarter	Percent, Seasonally Adjusted
1998-01-01	41.1521956708493
1998-04-01	41.1863996840296
1998-07-01	42.3061360859017
1998-10-01	42.3448505045975
1999-01-01	43.2169678502399
1999-04-01	43.5201082452429
1999-07-01	42.9001591405953
1999-10-01	43.2826887962591
2000-01-01	44.3619578474890
2000-04-01	45.2702998195321
2000-07-01	46.1122708432960
2000-10-01	47.6475829580153
2001-01-01	48.8105614966559
2001-04-01	49.9348321939859
2001-07-01	51.1568110538237
2001-10-01	51.3358841742679
2002-01-01	51.0818663527323
2002-04-01	51.6064536860418
2002-07-01	53.0774982860422
2002-10-01	52.5767004989225
2003-01-01	52.8053642067472
2003-04-01	53.8782016864484
2003-07-01	54.6525839793340
2003-10-01	53.6169997637693
2004-01-01	54.3273557862011
2004-04-01	55.5649980171975
2004-07-01	54.6826284999464
2004-10-01	55.0809425198886
2005-01-01	56.0862947492127
2005-04-01	56.1555121561168
2005-07-01	56.9946735884456
2005-10-01	57.2874373184534
2006-01-01	57.9163641421562
2006-04-01	58.1657638299410
2006-07-01	58.4912043228106
2006-10-01	59.4412014660208
2007-01-01	58.8035548629689
2007-04-01	58.7460469386397
2007-07-01	58.9758531906826
2007-10-01	58.5280547373381
2008-01-01	58.9140044576897
2008-04-01	59.7568687913569
2008-07-01	60.0333690749852
2008-10-01	60.0089908582026
2009-01-01	59.2061818358207
2009-04-01	59.1220711106615
2009-07-01	59.5045030490248
2009-10-01	58.7230909632208
2010-01-01	59.8098972929040
2010-04-01	60.2468835514415
2010-07-01	60.1115163283013
2010-10-01	60.5268562366948
2011-01-01	60.4085826590584
2011-04-01	61.2151974604336
2011-07-01	60.5578396675044
2011-10-01	61.3324290351930
2012-01-01	61.6733912004448
2012-04-01	62.3386917587770
2012-07-01	62.8147933075742
2012-10-01	62.2609416949236
2013-01-01	62.8038025994228
2013-04-01	62.9334373329043
2013-07-01	63.1768907860727
2013-10-01	62.7062262625047
2014-01-01	63.4107917087717
2014-04-01	63.5311613533946
2014-07-01	63.4584351040253
2014-10-01	64.6511646623437
2015-01-01	64.3956879100757
2015-04-01	64.7893233764815
2015-07-01	65.7763564550824
2015-10-01	65.8642220304577
2016-01-01	65.7435166688678
2016-04-01	66.1801717046964
2016-07-01	67.0017821587503
2016-10-01	66.6942832571798
2017-01-01	66.7207718879174
2017-04-01	67.9409772439469
2017-07-01	67.5876861324217
2017-10-01	69.1025431890618
2018-01-01	70.7532214885922
2018-04-01	69.8478941524896