Quarter	Percent, Seasonally Adjusted
1999-01-01	17.5509927732246
1999-04-01	17.3630845030341
1999-07-01	17.8498665168978
1999-10-01	18.1419056018173
2000-01-01	17.6980126914793
2000-04-01	17.1119709744110
2000-07-01	17.2353680138917
2000-10-01	18.3310167034577
2001-01-01	18.5162825959221
2001-04-01	18.9268226352637
2001-07-01	19.2717489479082
2001-10-01	18.4361068174576
2002-01-01	18.2852688009287
2002-04-01	18.1592306215993
2002-07-01	17.8922194046669
2002-10-01	17.8787721226448
2003-01-01	18.1054837257955
2003-04-01	18.0025529293643
2003-07-01	17.7047995676833
2003-10-01	16.9286036419342
2004-01-01	16.9709032658655
2004-04-01	17.0427469355762
2004-07-01	16.3908181709045
2004-10-01	16.0573577545171
2005-01-01	15.4646417778666
2005-04-01	15.4459738641624
2005-07-01	15.1548228510529
2005-10-01	15.7081838857852
2006-01-01	16.3884179823181
2006-04-01	15.2836758001529
2006-07-01	15.4266917724817
2006-10-01	14.9660882664164
2007-01-01	14.8250013483410
2007-04-01	14.7525497220098
2007-07-01	14.8004644135890
2007-10-01	14.3575298287195
2008-01-01	14.0238038129670
2008-04-01	14.3359830974825
2008-07-01	14.0421656862395
2008-10-01	14.8431784715623
2009-01-01	13.6593445620766
2009-04-01	14.7599559501072
2009-07-01	14.8096655162671
2009-10-01	14.4999047129794
2010-01-01	13.3304591407676
2010-04-01	14.1239963250927
2010-07-01	14.0172701620665
2010-10-01	13.2426275093468
2011-01-01	16.0624286201561
2011-04-01	14.6163737489381
2011-07-01	15.1662030302207
2011-10-01	15.1637893382070
2012-01-01	15.6249733194303
2012-04-01	15.2421084614907
2012-07-01	14.6500274090416
2012-10-01	14.5257080207175
2013-01-01	15.0500129411296
2013-04-01	14.3510241949263
2013-07-01	14.3378636780085
2013-10-01	14.9478898666514
2014-01-01	14.2166229723631
2014-04-01	14.3773404467275
2014-07-01	14.2322516157018
2014-10-01	14.5889468079315
2015-01-01	14.3790228476531
2015-04-01	15.2345390730298
2015-07-01	15.0986833870938
2015-10-01	15.0144137269903
2016-01-01	15.2487607184864
2016-04-01	15.0982963257134
2016-07-01	15.0332872188822
2016-10-01	14.0880564774273
2017-01-01	15.3069551910182
2017-04-01	14.8526343115793
2017-07-01	15.5401454050469
2017-10-01	14.9653860021920
2018-01-01	15.1875630049985
2018-04-01	15.2467435503182