Quarter	Percent, Seasonally Adjusted
1999-01-01	59.0995522976616
1999-04-01	58.2984706127348
1999-07-01	57.7850324571262
1999-10-01	57.2916219665931
2000-01-01	57.0067853527651
2000-04-01	56.5698192392976
2000-07-01	56.6419965288674
2000-10-01	56.8213119820561
2001-01-01	56.7559126536381
2001-04-01	56.9239578162485
2001-07-01	56.8502707295811
2001-10-01	56.7730452056616
2002-01-01	56.6803352175871
2002-04-01	56.5889119863634
2002-07-01	56.8237562075460
2002-10-01	57.1510046044321
2003-01-01	57.4659353083199
2003-04-01	57.9427275269832
2003-07-01	57.9227662424402
2003-10-01	57.5111245008049
2004-01-01	56.7220765906470
2004-04-01	56.8051763943103
2004-07-01	57.1944724495056
2004-10-01	57.1619882962537
2005-01-01	57.3604820698576
2005-04-01	57.4919530429036
2005-07-01	57.7571185290353
2005-10-01	58.2462798349568
2006-01-01	58.6711230339666
2006-04-01	59.3301906578631
2006-07-01	59.7398615210183
2006-10-01	59.9822594190709
2007-01-01	60.3938595868876
2007-04-01	60.4622205990634
2007-07-01	60.5885601988528
2007-10-01	61.3038419356990
2008-01-01	61.6309940570096
2008-04-01	61.7962009341927
2008-07-01	62.9225960589030
2008-10-01	62.7251066051080
2009-01-01	61.3217873468344
2009-04-01	60.5039619035304
2009-07-01	59.8596685960461
2009-10-01	58.9955543717012
2010-01-01	58.3109749546449
2010-04-01	58.6656599994830
2010-07-01	58.8887270895781
2010-10-01	59.1880930943378
2011-01-01	59.0456694840236
2011-04-01	59.4642406155049
2011-07-01	59.4731663095700
2011-10-01	59.3214378193711
2012-01-01	59.6854916593222
2012-04-01	59.8096915676517
2012-07-01	59.8658278902834
2012-10-01	59.4662597123260
2013-01-01	59.9321333146028
2013-04-01	59.8123928820168
2013-07-01	59.8709638591376
2013-10-01	59.9327986098308
2014-01-01	60.2992018664716
2014-04-01	60.7108843928464
2014-07-01	61.1890808670366
2014-10-01	61.6990575072420
2015-01-01	61.9990049363931
2015-04-01	62.4742367194672
2015-07-01	62.9260264712052
2015-10-01	63.5162915141617
2016-01-01	64.1559565691142
2016-04-01	64.8385728250480
2016-07-01	65.0723788311776
2016-10-01	65.4130452580949
2017-01-01	65.8050335975139
2017-04-01	66.0986510288804
2017-07-01	66.3466753451543
2017-10-01	66.4944910388751
2018-01-01	67.0255803412208
2018-04-01	67.1479729309507