Quarter	Percent, Seasonally Adjusted
1999-01-01	59.5440602791058
1999-04-01	59.7245787584802
1999-07-01	59.8832861319451
1999-10-01	59.9164959291386
2000-01-01	59.9529040550752
2000-04-01	60.0667421824402
2000-07-01	60.1230231937794
2000-10-01	60.3920946004230
2001-01-01	60.0046200465578
2001-04-01	59.5916574895174
2001-07-01	59.5436833922758
2001-10-01	59.3277024878822
2002-01-01	59.5612050655574
2002-04-01	59.6289485340611
2002-07-01	59.7349868924390
2002-10-01	59.9126010855520
2003-01-01	60.2696414807340
2003-04-01	60.6798140680065
2003-07-01	60.6916276262284
2003-10-01	60.7056656208126
2004-01-01	60.5925678170188
2004-04-01	60.2626631792208
2004-07-01	60.2596754880151
2004-10-01	60.6946257867787
2005-01-01	61.0196064798793
2005-04-01	61.2715498934284
2005-07-01	61.5285041858984
2005-10-01	61.5364955660489
2006-01-01	61.9669900548328
2006-04-01	62.0501692062258
2006-07-01	61.9313304019330
2006-10-01	62.1374345792858
2007-01-01	61.8963403578149
2007-04-01	61.6573671433821
2007-07-01	61.4980783072473
2007-10-01	61.4706674222510
2008-01-01	61.1485303058113
2008-04-01	60.9999012823383
2008-07-01	61.3593713705541
2008-10-01	61.2783685235686
2009-01-01	61.1872733756966
2009-04-01	61.2585295930563
2009-07-01	61.0532895527747
2009-10-01	61.3914131814741
2010-01-01	61.8042790870864
2010-04-01	61.9243830384965
2010-07-01	61.9650883198167
2010-10-01	61.9639763058559
2011-01-01	62.0457008422415
2011-04-01	62.3252359242722
2011-07-01	62.4343711884402
2011-10-01	62.6524696483934
2012-01-01	63.0962042546862
2012-04-01	63.5895769671221
2012-07-01	63.9720505633083
2012-10-01	64.1897401984870
2013-01-01	63.9022509640127
2013-04-01	64.5773600075036
2013-07-01	64.9277020116814
2013-10-01	65.3803094998948
2014-01-01	66.5176425186462
2014-04-01	66.7598359962776
2014-07-01	67.2104590149795
2014-10-01	67.4442298088140
2015-01-01	68.0725544030399
2015-04-01	68.4869872439386
2015-07-01	68.9038185766163
2015-10-01	69.1189191704530
2016-01-01	69.6124763158207
2016-04-01	70.0068115689600
2016-07-01	70.2900599651161
2016-10-01	70.6329158250808
2017-01-01	70.6855433756269
2017-04-01	71.1226836260538
2017-07-01	71.3300718561834
2017-10-01	71.4970022427254
2018-01-01	71.7945425999673
2018-04-01	71.8823021025009