Quarter	Percent, Seasonally Adjusted
1999-01-01	28.0461254400218
1999-04-01	29.2463885420300
1999-07-01	30.6313846279868
1999-10-01	30.8433182466699
2000-01-01	32.3290442466234
2000-04-01	32.9262723077718
2000-07-01	33.4003645265102
2000-10-01	34.1784067449944
2001-01-01	33.5589885275292
2001-04-01	34.1361810617294
2001-07-01	34.3860411359922
2001-10-01	34.3537716496010
2002-01-01	34.6505584110202
2002-04-01	34.8558102809248
2002-07-01	35.5067482915283
2002-10-01	36.7808468209680
2003-01-01	37.0350699559839
2003-04-01	38.2892601925119
2003-07-01	37.9411109350258
2003-10-01	37.9501776221459
2004-01-01	38.3046624172764
2004-04-01	37.7766495412290
2004-07-01	38.2190755172498
2004-10-01	39.2793498313217
2005-01-01	40.0487990195890
2005-04-01	40.2217796500956
2005-07-01	40.8972057709720
2005-10-01	41.1087876236224
2006-01-01	41.7128804003528
2006-04-01	41.4164368891941
2006-07-01	40.6280660167188
2006-10-01	41.1738021236118
2007-01-01	40.9151552431227
2007-04-01	40.1621109865478
2007-07-01	40.2681893706832
2007-10-01	39.0670687114459
2008-01-01	37.2444905558408
2008-04-01	37.7157088358046
2008-07-01	37.8258162885102
2008-10-01	38.1421122312916
2009-01-01	38.5095417199186
2009-04-01	38.7304990151028
2009-07-01	38.8408884702006
2009-10-01	38.7225505400271
2010-01-01	38.3338716601352
2010-04-01	38.7597423834258
2010-07-01	38.8132573509170
2010-10-01	38.4909574556092
2011-01-01	39.0055462606159
2011-04-01	38.8081905885692
2011-07-01	39.2930925997800
2011-10-01	40.0910567082395
2012-01-01	39.8148832411353
2012-04-01	41.2969768594915
2012-07-01	41.9495265978257
2012-10-01	42.5068773013641
2013-01-01	43.1971161229748
2013-04-01	44.4004502795329
2013-07-01	45.0702432197682
2013-10-01	46.5093526223533
2014-01-01	48.2378347412017
2014-04-01	48.7734411063470
2014-07-01	50.2890590088668
2014-10-01	51.0499246774759
2015-01-01	51.8346362790409
2015-04-01	53.9420499685382
2015-07-01	55.3477448353682
2015-10-01	56.3390331035488
2016-01-01	58.4077468656298
2016-04-01	59.2650452962523
2016-07-01	59.9524720637079
2016-10-01	61.0219271714626
2017-01-01	61.1183140904702
2017-04-01	62.1639595983048
2017-07-01	63.1410741898922
2017-10-01	63.8120960743316
2018-01-01	64.3961874992442
2018-04-01	64.1351727592407