Quarter	Percent, Seasonally Adjusted
1998-01-01	56.0276394982804
1998-04-01	55.5616780328717
1998-07-01	55.2371347069532
1998-10-01	54.7957731477906
1999-01-01	54.7019299936749
1999-04-01	54.5126289009209
1999-07-01	54.4205294123041
1999-10-01	54.4521132097199
2000-01-01	54.2798171757189
2000-04-01	53.8522981940728
2000-07-01	53.4484678827355
2000-10-01	53.2188173452013
2001-01-01	52.8700153430585
2001-04-01	52.9766223228333
2001-07-01	52.5439088080188
2001-10-01	52.5278036340767
2002-01-01	52.2677098735370
2002-04-01	52.0836709234545
2002-07-01	51.9160826910384
2002-10-01	52.0779896879895
2003-01-01	51.9515344336283
2003-04-01	51.3894698435949
2003-07-01	51.3079174720748
2003-10-01	52.0377066196508
2004-01-01	49.0481200779729
2004-04-01	49.4052192873781
2004-07-01	49.2949248913083
2004-10-01	48.9915170397898
2005-01-01	49.3679374133707
2005-04-01	49.6238078263471
2005-07-01	49.9394805211225
2005-10-01	49.1976424571091
2006-01-01	48.9611977773612
2006-04-01	49.0884555159826
2006-07-01	49.4398304009269
2006-10-01	49.1844488446978
2007-01-01	49.9246981190286
2007-04-01	49.6696461418905
2007-07-01	48.9310339877296
2007-10-01	48.9320425006025
2008-01-01	48.3752090727355
2008-04-01	48.1200288755714
2008-07-01	48.2088158866565
2008-10-01	48.7325322767498
2009-01-01	48.7918120148866
2009-04-01	48.7715996878442
2009-07-01	48.9974234755490
2009-10-01	49.0028950300463
2010-01-01	48.9864534483775
2010-04-01	48.8552701573548
2010-07-01	49.0655872265287
2010-10-01	48.7998602368689
2011-01-01	48.8001271040098
2011-04-01	48.8975498822655
2011-07-01	48.6015323755362
2011-10-01	47.9105443185872
2012-01-01	46.9355337469016
2012-04-01	46.4853067297871
2012-07-01	46.4612628952261
2012-10-01	46.3781156543950
2013-01-01	46.2708306381452
2013-04-01	46.6025935737379
2013-07-01	46.5506985639542
2013-10-01	46.2582512711174
2014-01-01	45.8389220940334
2014-04-01	46.0465184665514
2014-07-01	45.4556896194203
2014-10-01	45.0654087165386
2015-01-01	45.7473154333848
2015-04-01	45.7993597661217
2015-07-01	46.1621359604546
2015-10-01	45.8836553342549
2016-01-01	45.5962884191056
2016-04-01	44.6155990804676
2016-07-01	44.5534069569784
2016-10-01	44.4550476435837
2017-01-01	44.2145504636062
2017-04-01	44.3234936075120
2017-07-01	43.7456134260406
2017-10-01	44.0113836957748
2018-01-01	43.7660690740019
2018-04-01	43.3341864932768