Quarter	Percent, Seasonally Adjusted
1998-01-01	17.4466180031322
1998-04-01	17.3701851552551
1998-07-01	17.6474157488800
1998-10-01	17.5409088631777
1999-01-01	17.7504490465668
1999-04-01	18.9097512614823
1999-07-01	18.5747355938407
1999-10-01	18.9246446209480
2000-01-01	18.1975469776610
2000-04-01	17.7290218026330
2000-07-01	17.3818858175635
2000-10-01	16.5942752729054
2001-01-01	16.5591923152961
2001-04-01	16.6043571546632
2001-07-01	16.0742227480001
2001-10-01	16.7043091158978
2002-01-01	16.5493318368683
2002-04-01	15.9320062227333
2002-07-01	15.7952620123673
2002-10-01	15.4638593223707
2003-01-01	15.3643037798360
2003-04-01	15.0090757940628
2003-07-01	15.2272794669639
2003-10-01	15.6020838020016
2004-01-01	16.6530330338937
2004-04-01	16.4820557745484
2004-07-01	16.4830257425876
2004-10-01	16.1980798124815
2005-01-01	15.6910297594384
2005-04-01	15.7680171053327
2005-07-01	15.6963483669354
2005-10-01	15.0806182653529
2006-01-01	14.3164029670754
2006-04-01	13.9279351717499
2006-07-01	13.6115245987301
2006-10-01	13.6933805796802
2007-01-01	13.6929841380185
2007-04-01	13.2240411148693
2007-07-01	12.8596204218986
2007-10-01	12.4011729636669
2008-01-01	12.0222044430683
2008-04-01	11.4408897865448
2008-07-01	11.3094855866594
2008-10-01	11.7874286011179
2009-01-01	12.7277391275551
2009-04-01	13.0704941391588
2009-07-01	13.7185891965142
2009-10-01	14.2079881280059
2010-01-01	15.1894638184833
2010-04-01	15.8939361997586
2010-07-01	16.8509284861223
2010-10-01	18.1106035677184
2011-01-01	19.1115046708697
2011-04-01	20.6650736955010
2011-07-01	22.3166684409324
2011-10-01	24.7144406843748
2012-01-01	25.9445026570878
2012-04-01	28.0488593530223
2012-07-01	29.7434391428134
2012-10-01	29.8636524096803
2013-01-01	30.2664230797519
2013-04-01	31.8455194746235
2013-07-01	32.2657253380821
2013-10-01	31.8363870342709
2014-01-01	30.4434015012311
2014-04-01	31.1347073853619
2014-07-01	30.2400403993988
2014-10-01	29.6726329060940
2015-01-01	29.6642774092236
2015-04-01	29.1450738208401
2015-07-01	29.2095900103450
2015-10-01	28.4961846746468
2016-01-01	28.6061580675527
2016-04-01	28.5375349325464
2016-07-01	28.2299850987008
2016-10-01	27.9671469556492
2017-01-01	26.9274876327337
2017-04-01	26.4134291189060
2017-07-01	25.8918780012730
2017-10-01	25.8820611587705
2018-01-01	25.2577014303486
2018-04-01	24.6548386498593