Quarter	Percent, Seasonally Adjusted
1999-01-01	58.6642808203320
1999-04-01	57.2907758629225
1999-07-01	56.6330686620518
1999-10-01	56.0435937532498
2000-01-01	55.4543536914617
2000-04-01	55.1071104311600
2000-07-01	55.3454413666244
2000-10-01	55.2777467139552
2001-01-01	54.9895819811623
2001-04-01	55.2675186810718
2001-07-01	55.1950313484168
2001-10-01	55.2386978082024
2002-01-01	55.5764899436779
2002-04-01	55.2289464893337
2002-07-01	55.3451927350963
2002-10-01	55.8575041001547
2003-01-01	55.9545770728290
2003-04-01	56.6137517820531
2003-07-01	56.6412023463323
2003-10-01	56.3299902989124
2004-01-01	56.0625518553763
2004-04-01	56.3336144375423
2004-07-01	56.6325429370448
2004-10-01	56.8026515287489
2005-01-01	57.1203017104820
2005-04-01	57.4597794527022
2005-07-01	57.9508303484564
2005-10-01	58.6716313960318
2006-01-01	59.3387086766237
2006-04-01	59.8949247997043
2006-07-01	60.0407438504564
2006-10-01	60.2577205757050
2007-01-01	60.5521612082628
2007-04-01	60.8577050009051
2007-07-01	61.1662488952888
2007-10-01	61.6757011017888
2008-01-01	62.1557695307814
2008-04-01	62.2807528630360
2008-07-01	62.9746422312355
2008-10-01	62.8703200296312
2009-01-01	61.9050404513467
2009-04-01	60.8737536751783
2009-07-01	59.8639583766519
2009-10-01	58.8238793442747
2010-01-01	58.0577589932539
2010-04-01	58.1637977080668
2010-07-01	58.0728673611101
2010-10-01	58.4757262681162
2011-01-01	58.5398550059212
2011-04-01	58.8671295309179
2011-07-01	58.8277980357722
2011-10-01	58.9004127234189
2012-01-01	59.2467764816466
2012-04-01	59.1011384664691
2012-07-01	59.2293736378074
2012-10-01	58.9215978276094
2013-01-01	59.0955689778301
2013-04-01	58.7312515504834
2013-07-01	58.4109551105684
2013-10-01	58.2329222592118
2014-01-01	58.7109117483707
2014-04-01	59.1616229885536
2014-07-01	59.7412379107987
2014-10-01	60.2861636372078
2015-01-01	60.3864508505292
2015-04-01	60.7434776358401
2015-07-01	60.9971941358506
2015-10-01	61.3772069777686
2016-01-01	61.6976271313035
2016-04-01	62.1634002123059
2016-07-01	62.2343914586278
2016-10-01	62.3312477336691
2017-01-01	62.2562410685634
2017-04-01	62.2890357901711
2017-07-01	62.4080211293642
2017-10-01	62.5376268139842
2018-01-01	62.9874957288136
2018-04-01	63.4715866670030