Quarter	Percent, Seasonally Adjusted
1998-04-01	64.6000000000000
1999-04-01	64.6000000000000
2000-04-01	64.1000000000000
2001-04-01	65.5000000000000
2002-04-01	66.0000000000000
2003-04-01	66.2000000000000
2004-04-01	65.9000000000000
2005-04-01	66.3000000000000
2006-04-01	66.9000000000000
2007-04-01	66.9000000000000
2008-04-01	68.5000000000000
2009-04-01	68.9000000000000
2010-01-01	67.2425747119132
2010-04-01	66.9985723826854
2010-07-01	67.2538754426156
2010-10-01	67.1827265291437
2011-01-01	67.7881021722283
2011-04-01	67.6673309037616
2011-07-01	67.6721673320699
2011-10-01	68.4895740363631
2012-01-01	68.1799875130621
2012-04-01	67.9479345311780
2012-07-01	68.4144440898391
2012-10-01	68.1666336570924
2013-01-01	68.3456216869490
2013-04-01	68.3323408385723
2013-07-01	68.5804408698627
2013-10-01	68.9591043207375
2014-01-01	68.7477574802948
2014-04-01	69.0799138659402
2014-07-01	69.2809250447504
2014-10-01	70.5674834566856
2015-01-01	69.8802023743027
2015-04-01	69.5671216291211
2015-07-01	69.4479194693062
2015-10-01	70.2700263579968
2016-01-01	70.8952208326456
2016-04-01	70.3401789013720
2016-07-01	70.3034005731530
2016-10-01	70.7088221299829
2017-01-01	70.5224718741256
2017-04-01	69.9335813726435
2017-07-01	70.1491654602459
2017-10-01	70.4940112942798
2018-01-01	70.6801735586361
2018-04-01	70.5067726752623