Quarter	Percent, Seasonally Adjusted
1999-01-01	51.9599636011232
1999-04-01	52.2067778151557
1999-07-01	52.4759006125820
1999-10-01	52.5786298566852
2000-01-01	52.5915831277247
2000-04-01	52.6935393313062
2000-07-01	52.6483358620626
2000-10-01	52.9477484570362
2001-01-01	52.6866925743283
2001-04-01	52.2740485709470
2001-07-01	52.3817534137654
2001-10-01	52.1396379847558
2002-01-01	52.4555515759804
2002-04-01	52.6147050377994
2002-07-01	52.7536514385316
2002-10-01	52.9894992676018
2003-01-01	53.5260665070601
2003-04-01	53.9424184819047
2003-07-01	53.9810598115145
2003-10-01	54.2109347227394
2004-01-01	54.0002514931083
2004-04-01	53.7437003284812
2004-07-01	53.8093178982533
2004-10-01	54.4011832343131
2005-01-01	54.7458315428502
2005-04-01	55.1393117750664
2005-07-01	55.2533479882842
2005-10-01	55.1558247216669
2006-01-01	55.6517822261071
2006-04-01	55.4838274321444
2006-07-01	55.3721375353157
2006-10-01	55.4007088202444
2007-01-01	55.1532563789613
2007-04-01	54.8781652417158
2007-07-01	54.7867720149904
2007-10-01	54.9543731743914
2008-01-01	54.5910894857407
2008-04-01	54.3685127016773
2008-07-01	54.8707580627924
2008-10-01	55.0643194885709
2009-01-01	54.8000639155103
2009-04-01	54.8566195930429
2009-07-01	54.8884491726346
2009-10-01	55.3635971694275
2010-01-01	56.1034295946353
2010-04-01	56.2685359415272
2010-07-01	56.4318051953315
2010-10-01	56.2683974270815
2011-01-01	56.2205283763270
2011-04-01	56.6668223616590
2011-07-01	56.5879054932590
2011-10-01	56.8824125802683
2012-01-01	57.3711209561888
2012-04-01	57.9850700072521
2012-07-01	58.4632922126661
2012-10-01	58.3356912248974
2013-01-01	58.0652621211987
2013-04-01	58.4855029824262
2013-07-01	58.5896251209085
2013-10-01	59.1637244425256
2014-01-01	60.2411555831420
2014-04-01	60.5921296984191
2014-07-01	60.9097175331477
2014-10-01	61.1202452018471
2015-01-01	61.8023108443134
2015-04-01	62.1082269014416
2015-07-01	62.4207661219240
2015-10-01	62.4613672271263
2016-01-01	62.9023175934475
2016-04-01	63.2838403505102
2016-07-01	63.7194860925819
2016-10-01	63.9856106362074
2017-01-01	63.9004108222188
2017-04-01	64.1859800763442
2017-07-01	64.3557946067600
2017-10-01	64.4330617808964
2018-01-01	64.7494158992783
2018-04-01	64.9914939277305