Quarter	Percent, Seasonally Adjusted
1998-01-01	70.7239594451495
1998-04-01	70.6568928490110
1998-07-01	70.4091582826423
1998-10-01	70.7132664247578
1999-01-01	70.7413974409449
1999-04-01	70.9430761462555
1999-07-01	70.9088746764099
1999-10-01	70.9376804750316
2000-01-01	71.3272580453349
2000-04-01	71.1567518840499
2000-07-01	71.6362495737270
2000-10-01	71.5414052224367
2001-01-01	72.0197261339705
2001-04-01	71.8490013443424
2001-07-01	72.0604993155962
2001-10-01	72.2734945695799
2002-01-01	72.4226103876350
2002-04-01	72.6097862512887
2002-07-01	72.8752679529876
2002-10-01	72.7583013083744
2003-01-01	73.0164761876337
2003-04-01	72.8870614715044
2003-07-01	72.7356023320348
2003-10-01	72.7293017881008
2004-01-01	72.5207818935774
2004-04-01	72.6488991594484
2004-07-01	72.7896345588600
2004-10-01	72.9779685161855
2005-01-01	72.9836352398266
2005-04-01	73.0735943039927
2005-07-01	73.3103142101444
2005-10-01	73.4299999358632
2006-01-01	73.4417933710051
2006-04-01	73.6198414420159
2006-07-01	73.7268747632274
2006-10-01	73.6836420455758
2007-01-01	73.7898295797925
2007-04-01	73.6163332993135
2007-07-01	74.0820070046946
2007-10-01	73.9621723051619
2008-01-01	73.8917467617893
2008-04-01	74.1490602100368
2008-07-01	73.9756354611635
2008-10-01	73.7757570412484
2009-01-01	73.6736610868745
2009-04-01	73.4990720829016
2009-07-01	73.1697759803369
2009-10-01	73.3661364687091
2010-01-01	73.7490496823626
2010-04-01	73.6357773662238
2010-07-01	73.7127489140470
2010-10-01	73.6118169642780
2011-01-01	73.8334187179054
2011-04-01	73.8453824974515
2011-07-01	73.6110325762319
2011-10-01	73.2277343556183
2012-01-01	73.4293476691672
2012-04-01	73.5385647224088
2012-07-01	73.6280893603046
2012-10-01	73.0230717876414
2013-01-01	72.8321205140700
2013-04-01	72.9218259162419
2013-07-01	73.0377010053119
2013-10-01	73.3743990823814
2014-01-01	73.0836202086151
2014-04-01	73.2916141550415
2014-07-01	73.3883467706278
2014-10-01	73.1934743593887
2015-01-01	73.3280708955541
2015-04-01	73.3878275347537
2015-07-01	73.3633992803346
2015-10-01	73.5211035015468
2016-01-01	73.5297180042539
2016-04-01	73.4931732220006
2016-07-01	73.9698046354561
2016-10-01	73.9262926488014
2017-01-01	74.2062498232910
2017-04-01	74.4496830710274
2017-07-01	74.9491298286874
2017-10-01	75.0616541472361
2018-01-01	75.0732459160444
2018-04-01	75.1123828502539