Quarter	Percent, Seasonally Adjusted
1999-01-01	17.6418635460367
1999-04-01	16.8457995174380
1999-07-01	16.4504068616670
1999-10-01	14.4713656387665
2000-01-01	17.8241238443346
2000-04-01	17.1576005160181
2000-07-01	16.0395613846485
2000-10-01	17.5661148140185
2001-01-01	17.3894375268356
2001-04-01	18.4199227136110
2001-07-01	16.8778183379858
2001-10-01	19.0210390725633
2002-01-01	18.6120543293718
2002-04-01	19.0315789473684
2002-07-01	19.4948862450428
2002-10-01	19.9751604222728
2003-01-01	19.3766659831864
2003-04-01	21.4082214082214
2003-07-01	20.9471766848816
2003-10-01	21.3523847856712
2004-01-01	17.2330585159863
2004-04-01	17.9095477386935
2004-07-01	17.9890975166566
2004-10-01	19.6424944139752
2005-01-01	19.9714110680008
2005-04-01	21.8017276840806
2005-07-01	22.8813559322034
2005-10-01	22.5290697674419
2006-01-01	23.5845129059117
2006-04-01	24.2910758965805
2006-07-01	24.5808885163453
2006-10-01	25.7004423846640
2007-01-01	25.9408033826638
2007-04-01	25.8289334741288
2007-07-01	26.5611814345992
2007-10-01	27.6523940097026
2008-01-01	28.7610619469027
2008-04-01	28.6704473850032
2008-07-01	30.2960319126601
2008-10-01	29.3501048218029
2009-01-01	29.5535527143157
2009-04-01	29.5621202597947
2009-07-01	30.2466555183946
2009-10-01	31.8305155499896
2010-01-01	32.9171868497711
2010-04-01	33.2643773272652
2010-07-01	33.7021102233149
2010-10-01	31.9926873857404
2011-01-01	32.2139553589383
2011-04-01	32.4329692154916
2011-07-01	32.6373842820563
2011-10-01	31.5159835261816
2012-01-01	32.4916813466432
2012-04-01	33.8476562500000
2012-07-01	33.7093950593270
2012-10-01	34.1425519518353
2013-01-01	34.0627420604183
2013-04-01	35.9567901234568
2013-07-01	35.5990783410138
2013-10-01	35.1646248085758
2014-01-01	34.9418271981690
2014-04-01	36.8431037753747
2014-07-01	36.8847821987554
2014-10-01	36.9161508159820
2015-01-01	37.2903466269102
2015-04-01	39.0974662474570
2015-07-01	39.4128440366972
2015-10-01	39.4679300291545
2016-01-01	39.6848397029524
2016-04-01	41.7130544083318
2016-07-01	41.5198433885033
2016-10-01	41.5077683615819
2017-01-01	41.5586690017513
2017-04-01	42.0413122721750
2017-07-01	43.7898363479759
2017-10-01	43.8311688311688
2018-01-01	44.7778908104442
2018-04-01	44.0262140816670