Quarter	Percent, Seasonally Adjusted
1999-01-01	57.2843075306184
1999-04-01	57.7989310026350
1999-07-01	57.3460321300510
1999-10-01	57.5801933961719
2000-01-01	57.2036317867516
2000-04-01	57.3495720657827
2000-07-01	58.2854188759952
2000-10-01	57.7835192552176
2001-01-01	58.1172475050167
2001-04-01	57.6368645153838
2001-07-01	58.3615568465146
2001-10-01	57.9433560367701
2002-01-01	58.8498095416840
2002-04-01	58.0590797111873
2002-07-01	56.6937634088359
2002-10-01	56.1634745567165
2003-01-01	56.5906548312120
2003-04-01	56.3753656213848
2003-07-01	55.7376254266441
2003-10-01	57.4587399552725
2004-01-01	58.4553418328914
2004-04-01	58.9230668960649
2004-07-01	59.6911908381524
2004-10-01	58.7590063976603
2005-01-01	59.0308400988931
2005-04-01	58.7092888797841
2005-07-01	59.3187547628189
2005-10-01	59.9337230514571
2006-01-01	59.4928508963388
2006-04-01	59.8296600884117
2006-07-01	59.1494097181586
2006-10-01	58.7149581800786
2007-01-01	59.2227197442726
2007-04-01	60.1375546185792
2007-07-01	59.9855926107918
2007-10-01	59.4409130719972
2008-01-01	59.1671411337864
2008-04-01	59.1374054425259
2008-07-01	60.0985361246570
2008-10-01	59.5539636760683
2009-01-01	58.6932331477823
2009-04-01	59.3438392011340
2009-07-01	59.9696078269034
2009-10-01	59.7418360178726
2010-01-01	59.6093986573468
2010-04-01	59.1888543452317
2010-07-01	58.5976132965454
2010-10-01	59.2905378261718
2011-01-01	58.2124800165059
2011-04-01	57.7568192790429
2011-07-01	57.7028210036759
2011-10-01	58.0323515783571
2012-01-01	58.1018452999851
2012-04-01	56.9035490841722
2012-07-01	57.2987581305236
2012-10-01	57.8698142979389
2013-01-01	57.2292603169704
2013-04-01	57.1994016890453
2013-07-01	57.3197383980295
2013-10-01	57.2361348021368
2014-01-01	57.6145641104674
2014-04-01	58.1647202707318
2014-07-01	57.4359412593167
2014-10-01	57.4832898815544
2015-01-01	57.1208912019304
2015-04-01	57.7448920015883
2015-07-01	57.5966399413541
2015-10-01	56.8036774598796
2016-01-01	56.4049051611272
2016-04-01	56.6336757533378
2016-07-01	56.1500904762214
2016-10-01	57.2024641333681
2017-01-01	58.2863026853769
2017-04-01	58.0251454362301
2017-07-01	58.6170061186887
2017-10-01	58.7793765364014
2018-01-01	58.9350946277740
2018-04-01	59.0481769353511