Quarter	Percent, Seasonally Adjusted
1998-01-01	76.4748653926840
1998-04-01	76.2354855386968
1998-07-01	75.8092726196849
1998-10-01	75.3597476633317
1999-01-01	74.5446188929621
1999-04-01	74.0580615139634
1999-07-01	73.8496060119803
1999-10-01	73.4944887168839
2000-01-01	73.2219804046246
2000-04-01	73.1709517430785
2000-07-01	73.2039527430763
2000-10-01	73.1220100614615
2001-01-01	73.3549609178510
2001-04-01	73.1832820020328
2001-07-01	72.9843112318756
2001-10-01	73.2537650243952
2002-01-01	73.6100322177022
2002-04-01	73.9228309997592
2002-07-01	73.9650290708602
2002-10-01	73.9851711826958
2003-01-01	73.7826420106552
2003-04-01	73.2989650350768
2003-07-01	72.8518677270188
2003-10-01	72.5772478583712
2004-01-01	72.1546322866161
2004-04-01	72.1112348359028
2004-07-01	72.3977210635876
2004-10-01	72.5656067000954
2005-01-01	72.8886367211306
2005-04-01	73.3068506062007
2005-07-01	73.5088998004600
2005-10-01	73.3432056880180
2006-01-01	73.4912168352075
2006-04-01	73.6473253852327
2006-07-01	73.5939995226018
2006-10-01	73.9469496220913
2007-01-01	74.4907923759858
2007-04-01	74.5318278147829
2007-07-01	74.8916479694109
2007-10-01	75.2585375410781
2008-01-01	75.3350640276930
2008-04-01	75.3341789545588
2008-07-01	75.4093602843293
2008-10-01	75.5573085726676
2009-01-01	74.6498722226201
2009-04-01	73.9161630858779
2009-07-01	73.3864891536364
2009-10-01	73.4208623746393
2010-01-01	72.8834291298490
2010-04-01	73.4516031924884
2010-07-01	73.9202557165608
2010-10-01	73.8584769201066
2011-01-01	73.6896301793864
2011-04-01	74.0977963487306
2011-07-01	74.1814570724232
2011-10-01	74.1876780567252
2012-01-01	74.1690173025147
2012-04-01	74.5716287432140
2012-07-01	74.9520733974464
2012-10-01	74.8475062328504
2013-01-01	75.1498987778976
2013-04-01	75.7460948853158
2013-07-01	75.7639675472981
2013-10-01	76.0092301671119
2014-01-01	76.4731642731518
2014-04-01	76.9121797057379
2014-07-01	77.3203555512930
2014-10-01	77.3865362832507
2015-01-01	77.3515068868296
2015-04-01	77.7901058640396
2015-07-01	77.9207183388559
2015-10-01	78.4251955586850
2016-01-01	78.9091207828512
2016-04-01	79.0619585558716
2016-07-01	79.4342516090439
2016-10-01	79.8847696141992
2017-01-01	80.3994255184222
2017-04-01	80.6927230517518
2017-07-01	81.1022536705967
2017-10-01	81.3726605138578
2018-01-01	81.5849684274018
2018-04-01	81.7626196571314