Quarter	Percent, Seasonally Adjusted
1999-01-01	59.5724882293804
1999-04-01	59.5711782390884
1999-07-01	59.6856788081444
1999-10-01	59.4343553740991
2000-01-01	59.5655209898033
2000-04-01	59.3746522212308
2000-07-01	59.6481077234191
2000-10-01	59.8853478609172
2001-01-01	59.6977382195512
2001-04-01	60.2165547565344
2001-07-01	59.9966202503028
2001-10-01	60.6214539053961
2002-01-01	61.0269247615143
2002-04-01	61.1879719693869
2002-07-01	61.2559989114166
2002-10-01	61.5233242698172
2003-01-01	61.2637531156971
2003-04-01	61.6783900052990
2003-07-01	61.8095768536612
2003-10-01	61.5084272101157
2004-01-01	59.3482691597055
2004-04-01	59.4796019326110
2004-07-01	59.8142403071911
2004-10-01	60.2893876643605
2005-01-01	60.7730273149420
2005-04-01	60.8735001467462
2005-07-01	61.2721422033465
2005-10-01	61.4287112913925
2006-01-01	61.6221866471038
2006-04-01	62.1226348725944
2006-07-01	62.4743862180203
2006-10-01	62.7256349136898
2007-01-01	63.1100915335268
2007-04-01	63.0755306805268
2007-07-01	63.7933127127777
2007-10-01	64.0064576105966
2008-01-01	64.4646476215523
2008-04-01	64.8130946299585
2008-07-01	64.7665262199375
2008-10-01	65.1877143707649
2009-01-01	65.1969889283419
2009-04-01	65.2634182374581
2009-07-01	65.1006734305784
2009-10-01	65.2268353361962
2010-01-01	65.5174987845909
2010-04-01	65.4654084823053
2010-07-01	65.6969349653475
2010-10-01	65.9739686201931
2011-01-01	65.9146365797397
2011-04-01	66.0174891741539
2011-07-01	66.2548290856837
2011-10-01	66.0402850102636
2012-01-01	66.3963942150295
2012-04-01	66.5584459370540
2012-07-01	66.6828997117925
2012-10-01	66.9684700106411
2013-01-01	66.7286595107130
2013-04-01	67.0255580704131
2013-07-01	66.9852768816320
2013-10-01	66.7180866075337
2014-01-01	66.9797362717873
2014-04-01	67.3279829020354
2014-07-01	66.5375026649178
2014-10-01	66.9320042644661
2015-01-01	66.8998717549099
2015-04-01	66.8292077438840
2015-07-01	67.2582094637424
2015-10-01	67.3587530726389
2016-01-01	67.4969999110821
2016-04-01	67.5224120489000
2016-07-01	67.7581363521321
2016-10-01	67.8682461463346
2017-01-01	68.0122300452419
2017-04-01	68.1798562733694
2017-07-01	68.1003343652935
2017-10-01	68.3731792266079
2018-01-01	68.4870833642823
2018-04-01	68.4807832378919