Quarter	Percent, Seasonally Adjusted
1998-01-01	66.7149198589656
1998-04-01	66.7329223797577
1998-07-01	66.8851936047003
1998-10-01	66.9006815784504
1999-01-01	67.0875980616461
1999-04-01	67.2615214324510
1999-07-01	67.3112676667138
1999-10-01	67.4342316880587
2000-01-01	67.4417773865884
2000-04-01	67.8229463100510
2000-07-01	68.1472380547245
2000-10-01	68.5447855162196
2001-01-01	68.4971976662031
2001-04-01	68.3999601236980
2001-07-01	68.5863383769874
2001-10-01	68.7143463961488
2002-01-01	69.0477757205336
2002-04-01	69.0109955891045
2002-07-01	69.0568808515180
2002-10-01	69.2953777234684
2003-01-01	69.3092963644114
2003-04-01	69.4031362526800
2003-07-01	69.6591923928365
2003-10-01	70.0032742163705
2004-01-01	69.8477843449085
2004-04-01	70.2187997628023
2004-07-01	70.4244853091494
2004-10-01	70.1990536686766
2005-01-01	69.9545434838582
2005-04-01	69.8891529296986
2005-07-01	69.8228834575195
2005-10-01	70.0072041603196
2006-01-01	70.3464561969452
2006-04-01	70.6191012281222
2006-07-01	70.3706001508652
2006-10-01	70.3314710730718
2007-01-01	70.4475022818211
2007-04-01	70.5679203379895
2007-07-01	70.7132557571359
2007-10-01	70.5768388767336
2008-01-01	70.3484705148009
2008-04-01	70.3790325657411
2008-07-01	70.1112551024968
2008-10-01	69.7476115536219
2009-01-01	69.0550544463823
2009-04-01	68.6600917500675
2009-07-01	68.3180633355066
2009-10-01	67.9858379691940
2010-01-01	67.8963939918192
2010-04-01	67.5625768961082
2010-07-01	67.2245496904014
2010-10-01	67.4284693551537
2011-01-01	67.4514404560026
2011-04-01	67.3892052935922
2011-07-01	67.3296335915086
2011-10-01	66.8439361881425
2012-01-01	66.6810622532328
2012-04-01	66.4869790862294
2012-07-01	66.3116437890705
2012-10-01	65.9164397793787
2013-01-01	65.1781130808214
2013-04-01	64.5861154237942
2013-07-01	64.3782101029008
2013-10-01	64.5736509885998
2014-01-01	64.5167211805051
2014-04-01	64.6911618304721
2014-07-01	64.6321014138656
2014-10-01	64.8240850948074
2015-01-01	65.0367808897296
2015-04-01	65.1207112788307
2015-07-01	65.9034912486168
2015-10-01	65.9734431932002
2016-01-01	66.1713334931783
2016-04-01	66.6697062232140
2016-07-01	66.3631630525698
2016-10-01	66.5988865277646
2017-01-01	67.0375891783841
2017-04-01	66.8852790286618
2017-07-01	67.0692056771593
2017-10-01	67.2830947279648
2018-01-01	67.3337020151260
2018-04-01	67.7016934524287