Quarter	Percent, Seasonally Adjusted
1998-04-01	81.0000000000000
1999-04-01	81.0000000000000
2000-04-01	80.5000000000000
2001-04-01	81.2000000000000
2002-04-01	81.3000000000000
2003-04-01	81.3000000000000
2004-04-01	81.0000000000000
2005-04-01	80.9000000000000
2006-04-01	81.2000000000000
2007-04-01	81.6000000000000
2008-04-01	82.3000000000000
2009-04-01	82.5000000000000
2010-01-01	81.2293152469940
2010-04-01	81.1435771450735
2010-07-01	81.4733242805586
2010-10-01	81.3517910186829
2011-01-01	81.9491081320450
2011-04-01	81.9032025328606
2011-07-01	81.9680211450495
2011-10-01	82.3765677911459
2012-01-01	82.1544570660987
2012-04-01	82.1301851573765
2012-07-01	82.5623861773161
2012-10-01	82.2728674882333
2013-01-01	82.4136217599868
2013-04-01	82.3179252624340
2013-07-01	82.3458487696916
2013-10-01	82.5147085087173
2014-01-01	82.4446205847352
2014-04-01	82.7665674239170
2014-07-01	82.8409763108698
2014-10-01	83.4645753933152
2015-01-01	83.1582550298482
2015-04-01	83.0778674883396
2015-07-01	83.1803211044629
2015-10-01	83.7312971149978
2016-01-01	84.0912696478225
2016-04-01	83.6092355762172
2016-07-01	83.6943703565200
2016-10-01	84.0967246226460
2017-01-01	83.9861840829040
2017-04-01	83.6617031013308
2017-07-01	84.0160031267883
2017-10-01	84.1396392146356
2018-01-01	84.1447160294617
2018-04-01	83.9698855096226