Quarter	Percent, Seasonally Adjusted
1999-01-01	61.7015504281230
1999-04-01	59.5607644241073
1999-07-01	61.4981731788785
1999-10-01	59.8698946806113
2000-01-01	63.5249193442200
2000-04-01	64.9944949038235
2000-07-01	61.8239466792224
2000-10-01	63.9075752537237
2001-01-01	64.1935973228660
2001-04-01	67.0140830921964
2001-07-01	66.9351858902405
2001-10-01	67.2396091911360
2002-01-01	66.3727922558221
2002-04-01	66.1885478942490
2002-07-01	68.9171300168352
2002-10-01	68.5149423757530
2003-01-01	68.6052049992058
2003-04-01	69.9579148841063
2003-07-01	72.4694112319242
2003-10-01	67.7485157333297
2004-01-01	64.9685870461729
2004-04-01	63.3825002931831
2004-07-01	65.4608509090815
2004-10-01	64.8466879003079
2005-01-01	62.9778341751460
2005-04-01	67.0243353540216
2005-07-01	62.9856552509414
2005-10-01	61.9353954145002
2006-01-01	61.9514630226751
2006-04-01	61.1459201034739
2006-07-01	65.4787576289794
2006-10-01	65.8397377726977
2007-01-01	65.3226004262289
2007-04-01	64.8664873155901
2007-07-01	63.0169191735355
2007-10-01	65.1748468282464
2008-01-01	63.2931883370659
2008-04-01	63.6040027643900
2008-07-01	60.2857437893830
2008-10-01	63.2196192930059
2009-01-01	66.3600516676113
2009-04-01	63.4487885562681
2009-07-01	60.5684286338272
2009-10-01	66.4975106468036
2010-01-01	63.8314894519661
2010-04-01	63.6321538984167
2010-07-01	67.5120051760930
2010-10-01	65.8767165150003
2011-01-01	68.5049086011346
2011-04-01	68.4439592949223
2011-07-01	70.0484648303436
2011-10-01	63.8001459456332
2012-01-01	64.9431828998366
2012-04-01	74.6491847585172
2012-07-01	70.7818847152901
2012-10-01	69.5292876324298
2013-01-01	68.9441245316144
2013-04-01	69.1611588416728
2013-07-01	68.2881404522375
2013-10-01	72.9733877926168
2014-01-01	71.7722930489070
2014-04-01	68.6394254714718
2014-07-01	69.4287268527293
2014-10-01	68.3707889047803
2015-01-01	69.8794196789577
2015-04-01	65.9297380471457
2015-07-01	68.3425541284804
2015-10-01	69.1194845714495
2016-01-01	70.9414777142832
2016-04-01	69.0769522334024
2016-07-01	69.3887770377274
2016-10-01	68.4412480936702
2017-01-01	65.8071961683558
2017-04-01	66.2027687874043
2017-07-01	63.8433551534547
2017-10-01	64.4184943351858
2018-01-01	62.4624429486722
2018-04-01	64.3262910121056