Quarter	Percent, Seasonally Adjusted
1999-01-01	18.9636265890056
1999-04-01	18.7353327494826
1999-07-01	18.8635950297863
1999-10-01	18.8554972402360
2000-01-01	19.2522364246076
2000-04-01	19.8893377513781
2000-07-01	20.5849910933733
2000-10-01	20.8857764157281
2001-01-01	21.5531392347510
2001-04-01	21.4427848033920
2001-07-01	21.7620488285247
2001-10-01	22.0747269348547
2002-01-01	21.9195767485012
2002-04-01	22.4429294770019
2002-07-01	22.2066836800715
2002-10-01	22.7580875394251
2003-01-01	22.9890746045580
2003-04-01	23.5892540198122
2003-07-01	23.9190597951096
2003-10-01	24.3344589924567
2004-01-01	24.5334067667988
2004-04-01	24.6985844042208
2004-07-01	24.9614800721385
2004-10-01	25.5569159367872
2005-01-01	26.5320016364770
2005-04-01	27.4833137873147
2005-07-01	27.9934409385176
2005-10-01	28.5857716002845
2006-01-01	28.8247625601245
2006-04-01	28.7923551500528
2006-07-01	28.4582245551124
2006-10-01	29.4718980050037
2007-01-01	29.5752388720563
2007-04-01	30.3625761068605
2007-07-01	30.0319149860240
2007-10-01	30.7905027291017
2008-01-01	30.6177612458932
2008-04-01	31.2354220988973
2008-07-01	31.1892956531139
2008-10-01	31.6139416213025
2009-01-01	31.6454295626185
2009-04-01	32.3136307394161
2009-07-01	32.2389271439982
2009-10-01	32.3896039184061
2010-01-01	32.5344310659480
2010-04-01	32.5135092094382
2010-07-01	33.2480433465515
2010-10-01	34.0936089151606
2011-01-01	34.4721383620013
2011-04-01	35.8839212339862
2011-07-01	36.1594167273972
2011-10-01	36.0487179141527
2012-01-01	35.7915266293281
2012-04-01	36.0956701557878
2012-07-01	36.2982336150405
2012-10-01	35.8332371666306
2013-01-01	35.5172954218711
2013-04-01	36.1442290284223
2013-07-01	36.5299137145303
2013-10-01	37.0162977479436
2014-01-01	37.1759964700661
2014-04-01	37.4211747123493
2014-07-01	37.8218457627967
2014-10-01	38.7639335716192
2015-01-01	39.1232970475797
2015-04-01	39.8748949196335
2015-07-01	39.9961171845647
2015-10-01	41.5787248901874
2016-01-01	42.0710707056043
2016-04-01	42.4847272347445
2016-07-01	43.2778415028246
2016-10-01	43.1918399202893
2017-01-01	43.2974045940621
2017-04-01	43.4552630669482
2017-07-01	43.3686846814018
2017-10-01	44.0631975488654
2018-01-01	43.8326214371671
2018-04-01	44.8893427311589
2018-07-01	45.1723602394862