Quarter	Percent, Seasonally Adjusted
1999-01-01	31.9563568450139
1999-04-01	32.8868352463439
1999-07-01	35.0359484133741
1999-10-01	35.5631711477953
2000-01-01	36.4163511436882
2000-04-01	37.3465512493516
2000-07-01	36.7635673988728
2000-10-01	37.2755009810343
2001-01-01	39.1185815777142
2001-04-01	39.2608812859052
2001-07-01	39.0721070734111
2001-10-01	39.2483996426506
2002-01-01	38.7095758838368
2002-04-01	38.3290816133941
2002-07-01	37.0770268677485
2002-10-01	36.5680448506487
2003-01-01	34.2769304224489
2003-04-01	33.5340607117019
2003-07-01	33.5191237633265
2003-10-01	32.2767518589864
2004-01-01	33.6756098392755
2004-04-01	33.4335079024253
2004-07-01	32.5825442554222
2004-10-01	32.5793813235755
2005-01-01	31.5116167249890
2005-04-01	29.3200623348272
2005-07-01	29.8490795302817
2005-10-01	29.4683726124962
2006-01-01	29.1476511647986
2006-04-01	27.2214913785900
2006-07-01	26.5603849478674
2006-10-01	23.5103417610039
2007-01-01	20.8590064811522
2007-04-01	19.9129756197929
2007-07-01	20.6695430928131
2007-10-01	19.8929015448144
2008-01-01	19.0723191434595
2008-04-01	19.4432187921759
2008-07-01	18.6296991077371
2008-10-01	18.9436765470104
2009-01-01	22.7967835039954
2009-04-01	26.1075260471297
2009-07-01	28.5565439934764
2009-10-01	31.5303813793277
2010-01-01	33.7419304951578
2010-04-01	33.2899579607649
2010-07-01	33.5873829827260
2010-10-01	33.6014306229371
2011-01-01	33.4184568645185
2011-04-01	33.1030230417259
2011-07-01	33.1534416723042
2011-10-01	34.0419882896687
2012-01-01	33.5331891467903
2012-04-01	33.2380589756723
2012-07-01	33.9871291984706
2012-10-01	35.3253563273736
2013-01-01	33.8596728881198
2013-04-01	33.8481138599668
2013-07-01	33.2976927908755
2013-10-01	33.6689609617161
2014-01-01	32.0219685803622
2014-04-01	30.8927902713441
2014-07-01	29.0512498674328
2014-10-01	26.7645085421033
2015-01-01	26.7881989407562
2015-04-01	27.2243324689711
2015-07-01	26.4508566764734
2015-10-01	25.3086386778726
2016-01-01	24.6319170591134
2016-04-01	22.5782348052105
2016-07-01	21.2564792821220
2016-10-01	20.4675867231454
2017-01-01	19.1594016551195
2017-04-01	19.3362049124885
2017-07-01	18.4630332472336
2017-10-01	18.7278569612620
2018-01-01	17.3186174542849
2018-04-01	15.4897259554447