Quarter	Percent, Seasonally Adjusted
1999-01-01	21.7010697523000
1999-04-01	21.3091200297974
1999-07-01	20.7882220096904
1999-10-01	20.9240691249666
2000-01-01	19.8059306592918
2000-04-01	19.7903938592325
2000-07-01	19.6633786482401
2000-10-01	19.1755657800091
2001-01-01	19.7042691541421
2001-04-01	20.3450124037444
2001-07-01	20.8528837938694
2001-10-01	20.6822856883187
2002-01-01	21.1249377010340
2002-04-01	20.8242656480952
2002-07-01	20.8223466460569
2002-10-01	21.0292177443091
2003-01-01	20.7573190539392
2003-04-01	20.5226024972188
2003-07-01	21.2561584874027
2003-10-01	20.8349182630025
2004-01-01	21.1111735937075
2004-04-01	20.6729696788860
2004-07-01	20.3545344478742
2004-10-01	20.2241206729445
2005-01-01	20.4611507821763
2005-04-01	19.8935408570241
2005-07-01	19.7339695132883
2005-10-01	19.2310067955281
2006-01-01	19.1787252110371
2006-04-01	18.9462128009005
2006-07-01	19.0834738709938
2006-10-01	19.7018450532886
2007-01-01	19.5963477693602
2007-04-01	19.7646785414177
2007-07-01	19.9349007428939
2007-10-01	19.7245676918892
2008-01-01	19.5663115974676
2008-04-01	19.2389169382808
2008-07-01	18.8218781300945
2008-10-01	20.6142955562920
2009-01-01	22.7609005112169
2009-04-01	23.1436660849088
2009-07-01	22.0930712642073
2009-10-01	21.3696657465709
2010-01-01	20.9513751987314
2010-04-01	20.2982264512997
2010-07-01	20.0191384292343
2010-10-01	19.8853583728031
2011-01-01	19.0399244635555
2011-04-01	18.9137663767305
2011-07-01	18.9437212130005
2011-10-01	18.8811178125488
2012-01-01	18.9370468762943
2012-04-01	19.2842439101462
2012-07-01	19.5778266747971
2012-10-01	19.6663973959055
2013-01-01	19.9349543243092
2013-04-01	20.1450369293312
2013-07-01	20.0541424350531
2013-10-01	20.1487762726186
2014-01-01	20.3150149807435
2014-04-01	20.5105486806590
2014-07-01	20.5684586425516
2014-10-01	20.6605857379527
2015-01-01	21.0983861737020
2015-04-01	21.2370349155849
2015-07-01	21.4563921468801
2015-10-01	22.1535345844822
2016-01-01	22.4466785826829
2016-04-01	22.4159266176292
2016-07-01	22.2820451839715
2016-10-01	22.2903905430772
2017-01-01	21.8162135915546
2017-04-01	21.8761801232593
2017-07-01	22.0754438520933
2017-10-01	21.6097941067719
2018-01-01	21.4665242522104