Quarter	Percent, Seasonally Adjusted
1999-01-01	55.3968479674595
1999-04-01	55.5027276504072
1999-07-01	55.2672388216365
1999-10-01	55.1963889666021
2000-01-01	55.5764361832624
2000-04-01	55.4340061510776
2000-07-01	56.3138575972488
2000-10-01	55.7632855923502
2001-01-01	56.0686107208556
2001-04-01	55.3696546358700
2001-07-01	56.5013764336594
2001-10-01	56.3183971856826
2002-01-01	56.7983050429330
2002-04-01	56.5566717691130
2002-07-01	55.4871258186571
2002-10-01	54.7997342682484
2003-01-01	54.9229107018784
2003-04-01	54.8859375517538
2003-07-01	54.0162831531618
2003-10-01	55.5427985324550
2004-01-01	56.7629431070547
2004-04-01	57.5288970763564
2004-07-01	58.2394520492995
2004-10-01	56.9093909534230
2005-01-01	57.8122092045626
2005-04-01	57.4613173476908
2005-07-01	58.3630139704411
2005-10-01	59.0292678581546
2006-01-01	58.8530136191708
2006-04-01	59.7319275839946
2006-07-01	58.3195583934503
2006-10-01	58.0337301720889
2007-01-01	58.2676506883586
2007-04-01	59.3723599661307
2007-07-01	59.2121508928194
2007-10-01	58.5514262355062
2008-01-01	58.8731307896468
2008-04-01	58.9333896828873
2008-07-01	59.8213191885217
2008-10-01	60.0300857509529
2009-01-01	59.3422008752735
2009-04-01	59.3979854833169
2009-07-01	60.2062695750571
2009-10-01	59.8832451112562
2010-01-01	59.6768707953954
2010-04-01	59.7795526312660
2010-07-01	58.3866288724005
2010-10-01	59.6730717806731
2011-01-01	58.1823730817425
2011-04-01	58.0198252243139
2011-07-01	58.4205370255656
2011-10-01	59.4090849712493
2012-01-01	59.9544474853462
2012-04-01	58.0072764415101
2012-07-01	58.4139207539746
2012-10-01	58.8044260163279
2013-01-01	57.8250111292138
2013-04-01	58.4020149231123
2013-07-01	58.9773180059873
2013-10-01	58.2605300961429
2014-01-01	59.2962760905336
2014-04-01	59.9335473492642
2014-07-01	58.6206706539738
2014-10-01	58.4385877169361
2015-01-01	58.0608781825273
2015-04-01	59.2758948621502
2015-07-01	59.5076840564461
2015-10-01	58.7889329931367
2016-01-01	58.5224131481542
2016-04-01	59.3132047987733
2016-07-01	58.8188734545383
2016-10-01	60.3603382817930
2017-01-01	61.0538507565553
2017-04-01	60.3871639144361
2017-07-01	61.8637467936317
2017-10-01	62.4433212107820
2018-01-01	62.0625375424076
2018-04-01	61.6269619357622