Quarter	Percent, Seasonally Adjusted
1999-01-01	77.1137605189717
1999-04-01	76.1436560258619
1999-07-01	75.8312225552664
1999-10-01	75.4301836557493
2000-01-01	75.0243275199596
2000-04-01	74.5655520542416
2000-07-01	74.4798442014885
2000-10-01	74.8569345776533
2001-01-01	74.6246778718172
2001-04-01	74.8467787272260
2001-07-01	74.8255203413017
2001-10-01	75.0139764272046
2002-01-01	74.7294607251101
2002-04-01	74.7734370030287
2002-07-01	75.1218033072811
2002-10-01	75.4887895681480
2003-01-01	75.7504093035261
2003-04-01	76.2939491559521
2003-07-01	76.2424820331549
2003-10-01	75.7442670152978
2004-01-01	74.4765504766414
2004-04-01	74.5541275818118
2004-07-01	74.7382693468206
2004-10-01	74.8403148122534
2005-01-01	74.9390754902147
2005-04-01	74.9440184338453
2005-07-01	75.2454876952953
2005-10-01	75.9365316064520
2006-01-01	76.3232376544605
2006-04-01	77.1152497264664
2006-07-01	77.5898769961864
2006-10-01	77.8195564690455
2007-01-01	77.8505564004596
2007-04-01	77.7085611823862
2007-07-01	77.8788545479016
2007-10-01	78.6683376992347
2008-01-01	79.0581461001885
2008-04-01	79.6941867736508
2008-07-01	81.0422853646349
2008-10-01	80.6958233301395
2009-01-01	79.2471342489286
2009-04-01	78.2795828077197
2009-07-01	77.2349617079926
2009-10-01	76.3039325765992
2010-01-01	75.3967299604784
2010-04-01	75.3998474453658
2010-07-01	75.8615031772241
2010-10-01	76.4915944117043
2011-01-01	76.2778204420053
2011-04-01	76.4667020514470
2011-07-01	76.6921048701336
2011-10-01	76.5350134363923
2012-01-01	76.8080363537358
2012-04-01	76.4451500278205
2012-07-01	76.4878636013576
2012-10-01	75.6958906418785
2013-01-01	76.0348942822241
2013-04-01	75.8141318923830
2013-07-01	75.8903627550229
2013-10-01	76.2351967594256
2014-01-01	76.6123303186060
2014-04-01	76.5999406522373
2014-07-01	76.7530523408970
2014-10-01	77.2596653065184
2015-01-01	77.3931244688183
2015-04-01	77.8937730073925
2015-07-01	78.2919592824223
2015-10-01	79.0192808515044
2016-01-01	79.8389520324056
2016-04-01	80.1898314840476
2016-07-01	80.0932410676469
2016-10-01	79.8757386309906
2017-01-01	79.8755277899059
2017-04-01	79.7856881570288
2017-07-01	80.3704197070200
2017-10-01	79.9726186817289
2018-01-01	80.8020561165836
2018-04-01	80.6215369541644