Quarter	Percent, Seasonally Adjusted
1999-01-01	21.0199427183065
1999-04-01	21.1147894833417
1999-07-01	21.3045171323879
1999-10-01	21.2746341582047
2000-01-01	21.6425348418092
2000-04-01	22.4185188921570
2000-07-01	23.1199150220409
2000-10-01	23.6272729620762
2001-01-01	23.2658118336093
2001-04-01	23.3223466402625
2001-07-01	23.9400812832281
2001-10-01	24.1879173000871
2002-01-01	24.3292694939955
2002-04-01	24.9370872668825
2002-07-01	24.8269798368987
2002-10-01	25.2091604360815
2003-01-01	25.2719879464779
2003-04-01	25.9927785869036
2003-07-01	26.6152675369882
2003-10-01	26.7672628611304
2004-01-01	27.0634957807203
2004-04-01	27.4980746728206
2004-07-01	27.7192012046454
2004-10-01	27.8564523745152
2005-01-01	29.2298675551519
2005-04-01	29.8710249478886
2005-07-01	29.8267037582063
2005-10-01	30.6741303404346
2006-01-01	31.1457497171970
2006-04-01	30.9463727022911
2006-07-01	30.7421388057475
2006-10-01	31.8372010986750
2007-01-01	32.3589372309499
2007-04-01	32.7561275713692
2007-07-01	32.4701408626187
2007-10-01	33.2849422021858
2008-01-01	33.5239680592947
2008-04-01	33.8852496183460
2008-07-01	34.0430536049260
2008-10-01	35.4944067239135
2009-01-01	36.1587614814392
2009-04-01	37.3973338122585
2009-07-01	37.1721216411394
2009-10-01	37.5157847822289
2010-01-01	37.9733389264562
2010-04-01	37.6209854868601
2010-07-01	38.6031771004840
2010-10-01	39.5461853266649
2011-01-01	40.3092670142205
2011-04-01	41.5834809873732
2011-07-01	42.4986926458333
2011-10-01	42.7166265402685
2012-01-01	42.9997869626498
2012-04-01	44.0363729776801
2012-07-01	44.3368055838090
2012-10-01	44.0761447184003
2013-01-01	44.7772822031296
2013-04-01	44.9570507863836
2013-07-01	45.1668779653771
2013-10-01	45.9240220597884
2014-01-01	46.2711450106021
2014-04-01	46.9440886728257
2014-07-01	46.7079179658826
2014-10-01	47.6513356692691
2015-01-01	48.0409808735375
2015-04-01	49.0462093658826
2015-07-01	49.4871705998434
2015-10-01	50.9599706066276
2016-01-01	51.3016570779967
2016-04-01	51.3724015832162
2016-07-01	52.1036304249726
2016-10-01	51.8929739488958
2017-01-01	51.5312186244362
2017-04-01	51.9278848552791
2017-07-01	51.6078371156884
2017-10-01	52.1010564391222
2018-01-01	52.6606007915586
2018-04-01	52.7210933389189
2018-07-01	52.5282271182043