Quarter	Percent, Seasonally Adjusted
1999-01-01	76.9448933529351
1999-04-01	77.0195354578972
1999-07-01	77.1792376047102
1999-10-01	77.2897504061647
2000-01-01	77.1526295188134
2000-04-01	77.2956640758566
2000-07-01	77.3535214557938
2000-10-01	77.5796772869839
2001-01-01	77.3985005805853
2001-04-01	77.0897206577832
2001-07-01	77.0244627610111
2001-10-01	76.7379193172512
2002-01-01	77.0222310622531
2002-04-01	76.9452022784578
2002-07-01	76.9842708926900
2002-10-01	76.9963837514116
2003-01-01	77.2405812630322
2003-04-01	77.8779043738482
2003-07-01	77.9991894093554
2003-10-01	78.1771598428626
2004-01-01	77.9284984418569
2004-04-01	77.7845199132519
2004-07-01	77.7602682135306
2004-10-01	77.9883108445491
2005-01-01	78.2553930143830
2005-04-01	78.5593189226727
2005-07-01	79.0183822562289
2005-10-01	79.0615390390488
2006-01-01	79.6606356370191
2006-04-01	79.9687948388175
2006-07-01	79.8543452301312
2006-10-01	80.2928015209231
2007-01-01	80.0836318716225
2007-04-01	80.0271315885776
2007-07-01	80.1131149524483
2007-10-01	80.3569925753809
2008-01-01	80.1400755584166
2008-04-01	80.1055021172440
2008-07-01	80.4860926076351
2008-10-01	80.3849712035524
2009-01-01	80.3315301319559
2009-04-01	80.2477009356726
2009-07-01	80.1110093297879
2009-10-01	80.4122505810287
2010-01-01	80.9088591961526
2010-04-01	80.9317619133571
2010-07-01	80.9856684267848
2010-10-01	80.7382155388953
2011-01-01	80.6383253248224
2011-04-01	81.2274460610401
2011-07-01	81.3349602044533
2011-10-01	81.8294233484571
2012-01-01	82.3909841914215
2012-04-01	82.7597757322981
2012-07-01	83.1842521045257
2012-10-01	83.2749040717214
2013-01-01	82.6427579557868
2013-04-01	83.3346819426822
2013-07-01	83.4187202659310
2013-10-01	83.7599241057344
2014-01-01	84.8409927347500
2014-04-01	84.8219586751750
2014-07-01	85.1715258180494
2014-10-01	85.2188864629627
2015-01-01	85.6973157770099
2015-04-01	85.6839162710810
2015-07-01	85.8857793053764
2015-10-01	85.9424043509149
2016-01-01	85.8931312983310
2016-04-01	86.1259739470846
2016-07-01	86.1132940158156
2016-10-01	86.3315642130088
2017-01-01	86.5179087769941
2017-04-01	86.8489886890672
2017-07-01	87.0111128551336
2017-10-01	87.0682171090614
2018-01-01	87.2700780333561
2018-04-01	87.3221222079311