Quarter	Percent, Seasonally Adjusted
1999-01-01	44.6562662712022
1999-04-01	42.7237133152632
1999-07-01	41.7203822410294
1999-10-01	39.6469742117756
2000-01-01	45.3931981364498
2000-04-01	43.6253506143696
2000-07-01	42.6492243772816
2000-10-01	42.7680627791525
2001-01-01	41.2342495463358
2001-04-01	42.4004030546531
2001-07-01	42.2092931481715
2001-10-01	42.7425240522048
2002-01-01	41.6843433362830
2002-04-01	41.9191423776949
2002-07-01	42.1743293540259
2002-10-01	42.7900969727947
2003-01-01	43.1962396461378
2003-04-01	42.5268339323862
2003-07-01	42.7570188235660
2003-10-01	43.1563365067480
2004-01-01	37.5202724803376
2004-04-01	38.5928477206676
2004-07-01	38.8644481518986
2004-10-01	38.8270048098332
2005-01-01	39.5384914311020
2005-04-01	39.4927191530852
2005-07-01	40.3528244080713
2005-10-01	42.1064819453347
2006-01-01	43.6433420249230
2006-04-01	43.6722890783790
2006-07-01	44.2249535396813
2006-10-01	44.7504263077141
2007-01-01	45.7394497744858
2007-04-01	48.2538794464140
2007-07-01	48.5403584825578
2007-10-01	47.8457963038338
2008-01-01	50.9202586293755
2008-04-01	50.2772366608736
2008-07-01	48.8325467441421
2008-10-01	49.5038018775977
2009-01-01	49.4899312900776
2009-04-01	50.2319575588567
2009-07-01	51.2902076436637
2009-10-01	51.1504934273264
2010-01-01	51.3599535991704
2010-04-01	51.0771562318750
2010-07-01	51.9471733937379
2010-10-01	51.1246145576515
2011-01-01	50.5259901452411
2011-04-01	50.2859616186462
2011-07-01	50.3776540314329
2011-10-01	50.2638673887271
2012-01-01	50.2337337952227
2012-04-01	51.8713032803854
2012-07-01	53.3405402713264
2012-10-01	53.5369522659718
2013-01-01	53.8580675305884
2013-04-01	54.9502984468618
2013-07-01	55.4817701227650
2013-10-01	56.1407918215312
2014-01-01	55.8615455438697
2014-04-01	57.0253541554884
2014-07-01	56.7405110605396
2014-10-01	57.6490747772427
2015-01-01	57.0164934691398
2015-04-01	56.1008573538521
2015-07-01	57.6149992608545
2015-10-01	58.7575272740237
2016-01-01	60.4331637720842
2016-04-01	61.2089625409238
2016-07-01	61.5556950399987
2016-10-01	61.4782820675130
2017-01-01	61.9414037416525
2017-04-01	62.7067454845141
2017-07-01	63.0285294431301
2017-10-01	64.3947215498801
2018-01-01	65.1585207580573
2018-04-01	65.6109857225677