Quarter	Percent, Seasonally Adjusted
1999-01-01	42.3016138443828
1999-04-01	42.5206570659640
1999-07-01	42.7017828281449
1999-10-01	42.7823084385004
2000-01-01	42.9180260484663
2000-04-01	43.0151565851435
2000-07-01	43.2105705673702
2000-10-01	43.6410589352241
2001-01-01	43.2745119560258
2001-04-01	43.0396375891500
2001-07-01	43.2231038708792
2001-10-01	42.9772526231446
2002-01-01	43.1635185210004
2002-04-01	43.3206284730863
2002-07-01	43.2153628433162
2002-10-01	43.4499609545464
2003-01-01	43.8219192809682
2003-04-01	44.3036464382383
2003-07-01	44.4469126090646
2003-10-01	44.6061964777164
2004-01-01	44.3948328006368
2004-04-01	44.0415461831212
2004-07-01	43.9499103348572
2004-10-01	44.1476420417778
2005-01-01	44.1756835495418
2005-04-01	44.2079491997378
2005-07-01	44.2840087412076
2005-10-01	44.2102528039895
2006-01-01	44.5515544709612
2006-04-01	44.4166243002914
2006-07-01	44.2574666670135
2006-10-01	44.3305271452772
2007-01-01	44.3021025190121
2007-04-01	44.1820507079810
2007-07-01	43.9896562947515
2007-10-01	43.8642499401982
2008-01-01	43.5782792147785
2008-04-01	43.5041212614176
2008-07-01	43.9556255929352
2008-10-01	43.9798549115767
2009-01-01	43.2485490571282
2009-04-01	43.1326505417709
2009-07-01	42.8357228489441
2009-10-01	43.0786696839455
2010-01-01	43.5741479237211
2010-04-01	43.6245198457755
2010-07-01	43.7143699971775
2010-10-01	43.5604968026842
2011-01-01	43.4533220563900
2011-04-01	43.6493320748736
2011-07-01	43.7117012799435
2011-10-01	43.9728492658246
2012-01-01	44.1724782077228
2012-04-01	44.9194041514568
2012-07-01	45.4687696925227
2012-10-01	45.0987212880241
2013-01-01	44.9127838462456
2013-04-01	45.1851052489362
2013-07-01	45.3667647233664
2013-10-01	46.0708758800279
2014-01-01	47.5203066860589
2014-04-01	47.6386988875452
2014-07-01	48.1760535676458
2014-10-01	48.5717398660721
2015-01-01	48.9341171792131
2015-04-01	49.3256857361351
2015-07-01	49.7230936247255
2015-10-01	49.8306843843691
2016-01-01	50.5319699301212
2016-04-01	51.1764066087623
2016-07-01	51.5397017062408
2016-10-01	52.0571374954920
2017-01-01	51.8849990772132
2017-04-01	51.9880520034486
2017-07-01	52.1485237811151
2017-10-01	52.3137164560598
2018-01-01	52.7302373330060
2018-04-01	53.0423281006390