Quarter	Percent, Seasonally Adjusted
1999-01-01	31.0765382064082
1999-04-01	29.5848224849290
1999-07-01	28.7955630277239
1999-10-01	26.8456283318582
2000-01-01	31.8153855812446
2000-04-01	30.3378007821415
2000-07-01	29.3184346712942
2000-10-01	30.3274562404399
2001-01-01	29.5032777669639
2001-04-01	30.5216374786019
2001-07-01	29.7085113015875
2001-10-01	30.8154994348403
2002-01-01	30.1815651521773
2002-04-01	30.4181862666506
2002-07-01	31.0037113671372
2002-10-01	31.4430714568957
2003-01-01	31.3412105683541
2003-04-01	32.3043919160507
2003-07-01	31.9725798998921
2003-10-01	32.3838557635520
2004-01-01	27.5021379780955
2004-04-01	28.2413119709517
2004-07-01	28.3429134974905
2004-10-01	29.2512181552530
2005-01-01	29.8525096402122
2005-04-01	30.6929525801014
2005-07-01	31.7550583713612
2005-10-01	32.3227378838177
2006-01-01	33.6691399506683
2006-04-01	34.0301839630041
2006-07-01	34.3827168057622
2006-10-01	35.2978816368408
2007-01-01	36.0389501088311
2007-04-01	37.3357678376150
2007-07-01	37.7137991961225
2007-10-01	37.8588420452138
2008-01-01	39.9681697181472
2008-04-01	39.5600210015340
2008-07-01	39.5724020985908
2008-10-01	39.6308976917054
2009-01-01	39.6535662076340
2009-04-01	40.1248874576717
2009-07-01	40.8538185552818
2009-10-01	41.4593642005066
2010-01-01	42.2868489615163
2010-04-01	42.2062656492877
2010-07-01	42.9133451986970
2010-10-01	41.5484852776616
2011-01-01	41.5792884961447
2011-04-01	41.5588374358981
2011-07-01	41.5030817472066
2011-10-01	41.0900838087512
2012-01-01	41.5446820800860
2012-04-01	43.0706758916870
2012-07-01	43.7115614612850
2012-10-01	44.0670509923455
2013-01-01	44.2873341433403
2013-04-01	45.6959008610382
2013-07-01	45.7940980725380
2013-10-01	46.1029865230191
2014-01-01	45.6364990826117
2014-04-01	47.1454818241914
2014-07-01	47.1076133674921
2014-10-01	47.6397766014285
2015-01-01	47.6686845273679
2015-04-01	48.0696823824083
2015-07-01	48.8645518468646
2015-10-01	49.6824565107645
2016-01-01	50.6232067537663
2016-04-01	52.0504577315460
2016-07-01	52.1439778404465
2016-10-01	52.1251698076853
2017-01-01	52.4395878177141
2017-04-01	53.1008338578280
2017-07-01	53.9118613806067
2017-10-01	54.7779902653487
2018-01-01	55.5365345806020
2018-04-01	55.4820537518370