Quarter	Percent, Seasonally Adjusted
1999-04-01	50.2653736315403
1999-07-01	50.7206251900354
1999-10-01	50.9847926392796
2000-01-01	51.1660242495741
2000-04-01	51.5954616005628
2000-07-01	51.7018080764580
2000-10-01	51.8492524731098
2001-01-01	51.9973267932653
2001-04-01	52.0041403863725
2001-07-01	52.6457584422058
2001-10-01	52.7047273201220
2002-01-01	53.1159778827021
2002-04-01	53.1577683338748
2002-07-01	52.9901355002877
2002-10-01	53.0938276993271
2003-01-01	53.2850551875415
2003-04-01	53.5022527813128
2003-07-01	53.7659613138163
2003-10-01	53.8028309923793
2004-01-01	53.8342487457278
2004-04-01	53.8242329863481
2004-07-01	54.1794606260657
2004-10-01	54.9866099648331
2005-01-01	55.3463386054342
2005-04-01	55.8068138775978
2005-07-01	56.1518676618222
2005-10-01	56.4415072140379
2006-01-01	56.7737932664833
2006-04-01	56.9079885141382
2006-07-01	57.4649799078668
2006-10-01	57.5419039091371
2007-01-01	61.0500169522774
2007-04-01	61.5444777623093
2007-07-01	61.3457427899251
2007-10-01	61.3703339989552
2008-01-01	61.3867350964796
2008-04-01	61.1310044686352
2008-07-01	61.2349235249413
2008-10-01	60.7841222971492
2009-01-01	60.6663872071094
2009-04-01	60.6038408920713
2009-07-01	60.3874177638617
2009-10-01	59.9267866470599
2010-01-01	59.5946237600840
2010-04-01	59.7275297219832
2010-07-01	59.2947445805629
2010-10-01	59.5539230199707
2011-01-01	59.2652761156412
2011-04-01	59.3977299473419
2011-07-01	59.1854487375577
2011-10-01	59.4400719780721
2012-01-01	59.5419235437580
2012-04-01	59.0317816339726
2012-07-01	58.9981350920399
2012-10-01	59.1061664527687
2013-01-01	59.5705656871789
2013-04-01	60.0734002950783
2013-07-01	59.7615987886027
2013-10-01	59.7469848884090
2014-01-01	59.6865113823186
2014-04-01	59.1624564940143
2014-07-01	59.6408169082485
2014-10-01	59.3954532271170
2015-01-01	59.2668457826206
2015-04-01	59.3917843979583
2015-07-01	59.3729093661284
2015-10-01	59.6635451963760
2016-01-01	59.8101967642545
2016-04-01	60.5479844073643
2016-07-01	60.4127469945432
2016-10-01	60.2797958727238
2017-01-01	60.6043866340699
2017-04-01	60.0030359728861
2017-07-01	60.2798712953074
2017-10-01	60.6607669016749
2018-01-01	60.5425358227305
2018-04-01	60.9818264652662