Quarter	Percent, Seasonally Adjusted
1999-04-01	75.9288748593304
1999-07-01	76.0767760199360
1999-10-01	76.3120748939706
2000-01-01	75.9739069563543
2000-04-01	76.1200700954245
2000-07-01	76.4296992800179
2000-10-01	76.1110574626734
2001-01-01	76.1714330541391
2001-04-01	76.2099537394881
2001-07-01	76.0834318641848
2001-10-01	76.1249560982352
2002-01-01	76.0024337978844
2002-04-01	76.5522119389727
2002-07-01	76.5578966692560
2002-10-01	76.5958182601791
2003-01-01	76.3231923467152
2003-04-01	76.4711265244212
2003-07-01	76.2920425015599
2003-10-01	76.4984567780098
2004-01-01	76.7033542661612
2004-04-01	76.6740636083319
2004-07-01	76.5309887613934
2004-10-01	76.7330824486567
2005-01-01	77.1108182343186
2005-04-01	77.2423536821613
2005-07-01	77.3821722828133
2005-10-01	77.4519402751623
2006-01-01	77.8888878677245
2006-04-01	77.7436739321396
2006-07-01	77.3690715913058
2006-10-01	77.3123674756998
2007-01-01	77.2732623168428
2007-04-01	77.4673491757520
2007-07-01	77.5627271947640
2007-10-01	77.8449321993030
2008-01-01	78.0614360655322
2008-04-01	78.1748163433444
2008-07-01	78.2518963289381
2008-10-01	78.2445113812428
2009-01-01	78.4583249378926
2009-04-01	78.4091471603876
2009-07-01	78.6012552471354
2009-10-01	78.8382352246692
2010-01-01	78.4143416339044
2010-04-01	78.5700409262085
2010-07-01	78.6426260840057
2010-10-01	78.6357599312634
2011-01-01	79.0227809894030
2011-04-01	78.9538194598562
2011-07-01	78.9848057937049
2011-10-01	79.2073727833994
2012-01-01	79.0497696239755
2012-04-01	78.9694928583119
2012-07-01	79.3767896205820
2012-10-01	79.5658309593776
2013-01-01	79.5683832851462
2013-04-01	79.6071511550526
2013-07-01	79.3854909267198
2013-10-01	79.4778875930528
2014-01-01	79.9433194949684
2014-04-01	79.9432011210388
2014-07-01	79.8642101764004
2014-10-01	79.9648622702373
2015-01-01	79.9237924871614
2015-04-01	79.9016853735088
2015-07-01	79.7534096811862
2015-10-01	79.8133675984030
2016-01-01	79.7926226866844
2016-04-01	79.9952085880930
2016-07-01	80.2451702322573
2016-10-01	80.4067009843154
2017-01-01	80.4764475460323
2017-04-01	80.9494231564386
2017-07-01	80.8195342819070
2017-10-01	81.0404492167976
2018-01-01	81.5051125405587
2018-04-01	81.2859617085266