Quarter	Percent, Seasonally Adjusted
1999-04-01	31.5110122168967
1999-07-01	31.3082215741986
1999-10-01	31.1579498505811
2000-01-01	31.7666653976646
2000-04-01	31.3550464838352
2000-07-01	32.1943054274020
2000-10-01	32.7618504031251
2001-01-01	32.0936869076494
2001-04-01	32.5950123316612
2001-07-01	31.5655707702899
2001-10-01	32.0006575474421
2002-01-01	32.6073942473479
2002-04-01	32.5792563688207
2002-07-01	33.7966044424395
2002-10-01	33.3134559506272
2003-01-01	33.2043196073425
2003-04-01	34.0251576532938
2003-07-01	33.8499226122250
2003-10-01	33.8774377964195
2004-01-01	34.0474176390805
2004-04-01	34.1427990983543
2004-07-01	34.3000608301690
2004-10-01	34.5187710645343
2005-01-01	34.1537021270018
2005-04-01	34.9340030925324
2005-07-01	35.3524327703093
2005-10-01	34.8418926569552
2006-01-01	35.5553257900247
2006-04-01	35.1090021055961
2006-07-01	34.2476822588666
2006-10-01	35.5628289457917
2007-01-01	35.2244377506131
2007-04-01	35.8173078044934
2007-07-01	36.4248061789022
2007-10-01	35.8698722058993
2008-01-01	35.7337374907992
2008-04-01	35.8784376377351
2008-07-01	35.3896326759663
2008-10-01	35.7692595628295
2009-01-01	37.2611342009647
2009-04-01	37.8801045579985
2009-07-01	39.3016984980967
2009-10-01	40.3510973554313
2010-01-01	39.8387311088937
2010-04-01	39.0927128458786
2010-07-01	38.5808112788769
2010-10-01	38.7254076188424
2011-01-01	39.6178802816651
2011-04-01	39.2091265201927
2011-07-01	39.1910081723348
2011-10-01	39.0520418683176
2012-01-01	38.9050166294719
2012-04-01	38.5037211700101
2012-07-01	39.4794157982264
2012-10-01	39.4194337770814
2013-01-01	39.9909993841579
2013-04-01	39.9548689821231
2013-07-01	39.3423601044307
2013-10-01	39.8659878434252
2014-01-01	40.2573970597251
2014-04-01	40.4087732457529
2014-07-01	40.7947121586664
2014-10-01	40.5752917290623
2015-01-01	40.1085032927207
2015-04-01	40.4513169377259
2015-07-01	39.6923060584932
2015-10-01	39.8166395594291
2016-01-01	40.0421009372630
2016-04-01	40.5812097348178
2016-07-01	41.0525135887063
2016-10-01	41.1285213090448
2017-01-01	41.3463814598210
2017-04-01	41.3293240664292
2017-07-01	42.2782603004372
2017-10-01	41.7546724882612
2018-01-01	41.1293287145716
2018-04-01	41.5263936722070