Quarter	Percent, Seasonally Adjusted
1999-01-01	70.6199644677168
1999-04-01	70.3980547008167
1999-07-01	70.2970760485254
1999-10-01	70.1999385417482
2000-01-01	70.2225695923452
2000-04-01	70.6210362944278
2000-07-01	70.1954863433326
2000-10-01	70.0540226732260
2001-01-01	70.0550423690276
2001-04-01	69.7643627295322
2001-07-01	69.7201868993808
2001-10-01	69.6349793541236
2002-01-01	69.3160394909313
2002-04-01	69.3972686556707
2002-07-01	69.2500250116748
2002-10-01	69.3946347423508
2003-01-01	69.7742081508779
2003-04-01	69.6225903921315
2003-07-01	69.2809352300158
2003-10-01	69.3939910754249
2004-01-01	66.5992858575170
2004-04-01	66.6994618981250
2004-07-01	66.6518796551540
2004-10-01	66.5028913746124
2005-01-01	66.5932561066366
2005-04-01	66.5280082448218
2005-07-01	66.9660032410371
2005-10-01	67.1022028043783
2006-01-01	67.2138240652908
2006-04-01	67.4789600474773
2006-07-01	67.7983304699112
2006-10-01	67.9206723203284
2007-01-01	68.4063871731366
2007-04-01	68.6571541186736
2007-07-01	68.9360456684863
2007-10-01	68.9176738403703
2008-01-01	69.2441959551118
2008-04-01	69.5510476613539
2008-07-01	69.0955119168619
2008-10-01	68.8034172370816
2009-01-01	68.3140637757849
2009-04-01	67.7653630349466
2009-07-01	67.6694366252285
2009-10-01	67.7932901118036
2010-01-01	67.8827640267565
2010-04-01	67.9758713431343
2010-07-01	68.1635102301744
2010-10-01	68.5650349814328
2011-01-01	68.2895836246168
2011-04-01	68.3516390091688
2011-07-01	68.5787878030430
2011-10-01	68.2493840052141
2012-01-01	68.4501878350977
2012-04-01	68.1978425862832
2012-07-01	67.9825537294810
2012-10-01	67.9849684920771
2013-01-01	67.8832928925166
2013-04-01	68.1537941769035
2013-07-01	67.8626834717474
2013-10-01	67.6173748816358
2014-01-01	67.2040579878185
2014-04-01	67.1163702784154
2014-07-01	67.2497463704756
2014-10-01	67.1526751782904
2015-01-01	67.4844765216457
2015-04-01	67.1698449648789
2015-07-01	67.3484015683201
2015-10-01	67.3719654547175
2016-01-01	67.4852081917296
2016-04-01	67.5633454958154
2016-07-01	67.8728046026242
2016-10-01	67.9358988761525
2017-01-01	67.8794817234514
2017-04-01	68.3756006189763
2017-07-01	68.5184203007062
2017-10-01	68.9304039484046
2018-01-01	69.4005683316136
2018-04-01	69.7477747199202